Enjoy cleaner, better-tasting drinking water with GroAqua's range of under-sink water filtration systems. Designed to fit discreetly beneath your kitchen sink, these compact systems use multi-stage filtration and ultrafiltration technology to reduce sediment, chlorine, heavy metals and other unwanted impurities. Explore Aquafilter under-counter water filters and replacement cartridges to find a practical drinking water filtration solution for your home.
Under-Sink Water Filtration Systems
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Aquafilter Aquafilter EXCITO-B-CLR-CRT – 4-Piece Replacement Filter Cartridge Set
Keep your Aquafilter EXCITO-B under-sink drinking water filtration system performing effectively with the Aquafilter EXCITO-B-CLR-CRT Replacement Cartridge Set. This four-piece replacement set is designed specifically for the EXCITO-B filtration system and provides replacement cartridges for its sediment filtration, water softening, activated carbon and additional conditioning stages. The cartridges work together to reduce suspended particles, chlorine, selected organic contaminants, iron and certain heavy metals, while helping to reduce water hardness and improve the taste and aroma of filtered water. Featuring Aquafilter's 1/4-inch QM quick-connect fittings, the cartridges are designed for straightforward replacement without the need to change the complete filtration system. Four replacement cartridges for the EXCITO-B system The EXCITO-B-CLR-CRT contains four inline cartridges: AIPRO-20M-QM AISTRO-2-QM AICRO-3-QM Fourth cartridge as supplied for the EXCITO-B system – check the model identification before ordering. Together, these cartridges replace the first four filtration stages of the EXCITO-B system. Stage 1 – AIPRO-20M-QM sediment filter The first cartridge uses spun-bonded polypropylene filtration media with a nominal 20-micron rating. It helps capture suspended particles such as: Sand Rust Silt Sediment Other suspended solids This initial filtration stage helps protect the downstream cartridges from larger particles. Stage 2 – AISTRO-2-QM water softening and iron reduction The second cartridge contains ion-exchange resin designed to reduce water hardness and lower the concentration of iron. It helps address: Dissolved hardness minerals Certain iron compounds Water-quality issues associated with hard water This conditioning stage also helps prepare the water for subsequent filtration. Stage 3 – AICRO-3-QM activated carbon filter The third cartridge uses coconut-shell activated carbon to reduce free chlorine and selected organic substances. Its main benefits include: Reduction of free chlorine Improved taste and odour Reduction of selected organic compounds Additional treatment following sediment filtration and water conditioning Stage 4 – Additional carbon and KDF treatment The EXCITO-B system documentation identifies its fourth stage as an activated carbon and KDF filtration cartridge. This combination is designed to provide additional reduction of chlorine, selected organic substances, iron and certain heavy metals. KDF media also has bacteriostatic properties that help inhibit bacterial growth within the cartridge. Important: Aquafilter's current replacement-set listing identifies this fourth cartridge as AIPRO-4-QM, whereas some EXCITO-B system documentation identifies it as AICRO-4-QM. Please confirm the exact cartridge supplied before ordering. Designed for convenient cartridge replacement The EXCITO-B-CLR-CRT uses Aquafilter's QM quick-connect cartridge format, with 1/4-inch connections. The cartridges are designed to fit the dedicated EXCITO-B system, allowing you to replace the four inline filtration stages while retaining the existing filtration unit, housing and drinking water tap. Key features Genuine Aquafilter replacement cartridge set Four inline replacement cartridges Designed for the Aquafilter EXCITO-B system 20-micron polypropylene sediment filtration Ion-exchange water softening and iron reduction Coconut-shell activated carbon filtration Additional carbon and KDF treatment Helps reduce chlorine and selected organic contaminants Helps improve filtered water taste and aroma 1/4-inch QM quick-connect fittings Cartridge dimensions: approximately 2.5 × 12 inches Technical specifications Specification Details Brand Aquafilter Product model EXCITO-B-CLR-CRT Product type Replacement inline cartridge set Number of cartridges 4 Compatible system Aquafilter EXCITO-B First cartridge AIPRO-20M-QM Second cartridge AISTRO-2-QM Third cartridge AICRO-3-QM Fourth cartridge Verify AIPRO-4-QM / AICRO-4-QM Cartridge dimensions 2.5 × 12 inches Connection type 1/4-inch QM quick connector Nominal sediment rating 20 microns Filtration technologies Sediment, ion exchange, activated carbon and KDF Ultrafiltration membrane Not included Cartridge replacement and maintenance Regular cartridge replacement is important for maintaining filtration performance and water quality. An indicative replacement interval for the EXCITO-B's four inline cartridges is approximately 3–6 months. Actual replacement frequency depends on incoming water quality, sediment levels, hardness and the volume of water filtered. Consider replacing the cartridges sooner if you notice: A reduction in water flow Changes in the taste or smell of filtered water Increased sediment in the incoming supply Reduced performance of the water-softening stage Follow the manufacturer's installation and flushing instructions whenever replacing cartridges. Important compatibility information This replacement set is designed for the Aquafilter EXCITO-B system. It should not be confused with replacement sets designed for other EXCITO or EXCITO-ST models, which can use different cartridge connections and configurations. Please note: This set contains four inline cartridges only. It does not include the fifth-stage TLCHF-2T ultrafiltration membrane. If your EXCITO-B system also requires a membrane replacement, order the compatible TLCHF-2T separately.
€36,95
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Aquafilter Aquafilter EXCITO-B 5-Stage Under-Sink Water Filter with Ultrafiltration
Improve the quality, taste and clarity of your drinking water with the Aquafilter EXCITO-B 5-Stage Under-Sink Water Filtration System. Designed for installation beneath the kitchen sink, this compact drinking water filter combines sediment filtration, water softening, activated carbon, KDF media and ultrafiltration to provide multiple stages of water treatment. The EXCITO-B uses Aquafilter's QM quick-change cartridge system, making routine cartridge replacement straightforward. Supplied with a dedicated chrome drinking water tap, connection fittings and flexible tubing, it provides a convenient point-of-use filtration solution without requiring a separate storage tank. Five stages of water filtration The Aquafilter EXCITO-B combines five specialist filtration stages, each designed to address different water-quality concerns. Stage 1 – AIPRO-20M-QM sediment filter The first stage uses a 20-micron polypropylene sediment cartridge to reduce suspended particles, including: Sand Rust Silt Clay Other suspended sediment This initial filtration stage helps protect the downstream cartridges and membrane from larger particles. Stage 2 – AISTRO-2-QM water softening and iron reduction The second stage contains specialist ion-exchange filtration media designed to reduce water hardness and lower iron concentrations. It helps address: Dissolved hardness minerals Certain iron compounds Water-quality issues associated with hard water This stage also helps improve the overall quality of the water supplied to the subsequent filtration stages. Stage 3 – AICRO-3-QM activated carbon filter The third stage contains coconut-shell granular activated carbon, designed to reduce chlorine and selected organic contaminants. Benefits include: Reduction of free chlorine Improved taste and odour Reduction of selected organic compounds Further treatment of water following sediment filtration and softening Stage 4 – AICRO-4-QM activated carbon and KDF filter The fourth stage combines coconut-shell activated carbon with KDF filtration media. It is designed to reduce chlorine, selected organic contaminants and certain heavy metals, including metals such as lead, nickel and chromium. This additional treatment stage helps improve the taste and aroma of filtered water. Stage 5 – TLCHF-2T ultrafiltration membrane The final stage uses Aquafilter's hollow-fibre ultrafiltration membrane, with a nominal membrane pore size of approximately 0.02 microns. It provides fine filtration of suspended particles and helps separate certain bacteria and viruses from the water. The membrane also reduces fine sediment such as rust, sand and silt that may remain after the earlier filtration stages. Compact under-sink installation The EXCITO-B is designed to fit beneath a kitchen sink, keeping the main filtration unit out of sight while providing filtered water through its dedicated drinking water tap. Its QM push-in, push-out cartridge connections make replacement easier than conventional multi-housing systems. The supplied kit includes: Five-stage EXCITO-B filtration system AIPRO-20M-QM sediment cartridge AISTRO-2-QM softening and iron-reduction cartridge AICRO-3-QM activated carbon cartridge AICRO-4-QM activated carbon and KDF cartridge TLCHF-2T ultrafiltration membrane Chrome drinking water tap Feed water connection adapter Flexible tubing Shut-off valve Connection fittings and installation accessories Installation instructions Key features Five-stage under-sink drinking water filtration Combines sediment filtration, softening, activated carbon, KDF and ultrafiltration 20-micron polypropylene sediment pre-filter Specialist media for water hardness and iron reduction Coconut-shell activated carbon filtration KDF media for additional contaminant reduction 0.02-micron hollow-fibre ultrafiltration membrane QM quick-change cartridge connections Dedicated chrome drinking water tap included Compact design for installation beneath the kitchen sink No separate storage tank required Technical specifications Specification Details Brand Aquafilter Model EXCITO-B System type 5-stage under-sink water filtration Filtration technology Sediment, ion exchange, activated carbon, KDF and ultrafiltration Stage 1 AIPRO-20M-QM Stage 2 AISTRO-2-QM Stage 3 AICRO-3-QM Stage 4 AICRO-4-QM Stage 5 TLCHF-2T UF membrane pore size 0.02 microns Nominal flow rate 1.9 litres per minute Water supply pressure 3.5 bar Water temperature range 2–45°C Feed water connection 1/2 inch Outlet tubing 1/4 inch Dimensions (H × W × D) 438 × 100 × 360mm Installation location Under sink Drinking water tap Included Cartridge replacement and maintenance Regular cartridge replacement is important to maintain filtration performance. Aquafilter provides the following indicative replacement intervals: Cartridge Recommended replacement interval AIPRO-20M-QM sediment filter 3–6 months AISTRO-2-QM softening cartridge 3–6 months AICRO-3-QM carbon cartridge 3–6 months AICRO-4-QM carbon and KDF cartridge 3–6 months TLCHF-2T ultrafiltration membrane 6–12 months Actual replacement intervals depend on incoming water quality, contamination levels and the volume of water filtered. The system should be flushed for at least 10 minutes following installation or cartridge replacement, then left unused for 5–6 hours to allow the filtration media to condition as instructed by the manufacturer. Installation and operating requirements The EXCITO-B is designed for connection to a suitable cold-water supply. Its installation should follow the manufacturer's instructions and be carried out by a suitably trained installer. Important installation considerations include: Use the supplied feed water connection and compatible 1/4-inch tubing. Install a suitable pressure regulator on the water inlet to protect the system from pressure surges and excessive pressure. Observe the correct water-flow direction when installing replacement cartridges. Secure quick-connect fittings with their safety clips. Flush the system after installation and cartridge replacement. Important water-quality notice: The EXCITO-B must not be used with microbiologically contaminated water or water of unknown origin. Ultrafiltration should not be treated as a substitute for disinfection where the incoming water supply is unsafe. The system is intended for suitable potable-water applications. It is a filtration and conditioning system, not a reverse osmosis unit, and should not be described as removing all dissolved salts or minerals.
€135,95
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Aquafilter Aquafilter EXCITO-ST-CRT – 4-Piece Replacement Water Filter Cartridge Set
Maintain the filtration performance of your Aquafilter EXCITO-ST under-sink water filtration system with the Aquafilter EXCITO-ST-CRT Four-Piece Replacement Cartridge Set. Designed specifically for the EXCITO-ST system, this replacement set combines sediment filtration, water softening, activated carbon and KDF media to provide multiple stages of drinking water treatment. The four cartridges work together to reduce suspended particles, chlorine, selected organic contaminants, iron and certain heavy metals, while helping to reduce water hardness and improve the taste and aroma of filtered water. Featuring 1/4-inch NPT connections, the cartridges are designed to replace the original inline filters without replacing the complete under-sink filtration system. Four stages of replacement filtration The EXCITO-ST-CRT contains four specialist cartridges, each performing a different filtration function. Stage 1 – AIPRO-20M-AQ sediment filter The first stage uses polypropylene filtration media with a nominal 20-micron rating. It helps reduce suspended particles, including: Sand Rust Silt Sediment Other suspended solids This initial filtration stage helps protect the subsequent cartridges from larger particles. Stage 2 – AISTRO-L-AQ water softening cartridge The second stage contains ion-exchange media designed to reduce water hardness. It helps reduce dissolved calcium and magnesium ions, which contribute to scale formation. This conditioning stage can improve the characteristics of hard water before it passes through the remaining filtration stages. Benefits include: Reduction of water hardness Reduced scale-forming potential Improved water conditioning Additional treatment of water before carbon filtration Actual softening performance depends on incoming water hardness, water consumption and cartridge condition. Stage 3 – AICRO-L4-AQ activated carbon and KDF filter The third stage combines granular activated carbon with KDF filtration media. The activated carbon is designed to reduce free chlorine and selected organic compounds, helping improve the taste and smell of drinking water. KDF media provides additional treatment of certain dissolved metals and has bacteriostatic properties that help inhibit bacterial growth within the cartridge. Key benefits include: Reduction of free chlorine Improved taste and odour Reduction of selected organic contaminants Additional reduction of certain heavy metals Bacteriostatic properties from KDF media Stage 4 – AIPRO-1M-AQ fine sediment filter The final cartridge uses polypropylene sediment filtration media with a nominal 5-micron rating. It provides an additional filtration stage to capture finer suspended particles that may remain after the earlier treatment stages. It helps reduce: Fine sediment Rust particles Sand Other suspended solids This final mechanical filtration stage helps improve the clarity of the filtered water. Designed for the Aquafilter EXCITO-ST system The EXCITO-ST-CRT is designed to replace the four original inline cartridges in the Aquafilter EXCITO-ST under-sink filtration system. The set contains: 1 × AIPRO-20M-AQ – 20-micron sediment cartridge 1 × AISTRO-L-AQ – water-softening cartridge 1 × AICRO-L4-AQ – activated carbon and KDF cartridge 1 × AIPRO-1M-AQ – 5-micron sediment cartridge The cartridges use 1/4-inch NPT connections and are approximately 2.5 × 12 inches in size. Key features Genuine Aquafilter replacement cartridge set Four inline replacement cartridges Designed for the Aquafilter EXCITO-ST system 20-micron first-stage sediment filtration Ion-exchange water-softening media Granular activated carbon filtration KDF media for additional contaminant reduction 5-micron final sediment filtration Helps reduce chlorine and selected organic contaminants Helps reduce water hardness and improve taste and odour 1/4-inch NPT connections Approximate cartridge dimensions: 2.5 × 12 inches Technical specifications Specification Details Brand Aquafilter Product model EXCITO-ST-CRT Product type Replacement inline water filter cartridge set Number of cartridges 4 Compatible system Aquafilter EXCITO-ST Stage 1 AIPRO-20M-AQ Stage 2 AISTRO-L-AQ Stage 3 AICRO-L4-AQ Stage 4 AIPRO-1M-AQ First-stage micron rating 20 microns Fourth-stage micron rating 5 microns Filtration technologies Sediment, ion exchange, activated carbon and KDF Cartridge dimensions 2.5 × 12 inches Connection type 1/4-inch NPT Replacement interval Refer to manufacturer guidance and incoming water quality Ultrafiltration membrane Not included Cartridge replacement and maintenance Regular cartridge replacement helps maintain filtration performance and drinking water quality. GroAqua currently lists an indicative filter life of 6–12 months for this set. Actual replacement intervals depend on incoming water quality, sediment levels, water hardness and the volume of water filtered. Consider replacing cartridges sooner if you notice: Reduced water flow Changes in the taste or smell of filtered water Increased sediment in the incoming water supply Reduced water-softening performance Always follow the manufacturer's installation and flushing instructions when replacing cartridges. Important compatibility information The EXCITO-ST-CRT is designed for the Aquafilter EXCITO-ST system and uses 1/4-inch NPT connections. It should not be confused with the EXCITO-B-CLR-CRT replacement set, which uses different cartridges and 1/4-inch QM quick-connect fittings. Please note: This product contains four replacement cartridges only. It does not include the EXCITO-ST filtration unit, drinking water tap or an additional ultrafiltration membrane. If your installation uses an optional TLCHF-FP ultrafiltration membrane, this must be purchased separately.
€35,95
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Aquafilter Aquafilter EXCITO-ST – 4-Stage Under-Sink Water Filtration System
Enjoy better-tasting drinking water with the Aquafilter EXCITO-ST 4-Stage Under-Sink Water Filtration System. Designed for installation beneath your kitchen sink, this compact water filter combines four filtration technologies to reduce sediment, chlorine, water hardness and selected contaminants. The EXCITO-ST uses a combination of polypropylene sediment filters, ion-exchange resin and granular activated carbon with KDF media. Together, these four stages help improve the taste, smell and overall quality of water used for drinking and cooking. Its compact enclosed design keeps the filtration system neatly out of sight, while the included dedicated drinking water tap provides convenient access to filtered water. Four stages of water filtration The Aquafilter EXCITO-ST contains four specialist inline cartridges, each designed to perform a different filtration function. Stage 1 – AIPRO-20M-AQ sediment filter The first stage uses a polypropylene sediment cartridge with a nominal 20-micron filtration rating. It helps reduce suspended particles such as: Sand Rust Silt Sediment Other suspended solids This initial filtration stage helps protect the subsequent cartridges from larger particles. Stage 2 – AISTRO-L-AQ water-softening cartridge The second stage uses ion-exchange resin to reduce water hardness. It helps reduce calcium and magnesium ions, which contribute to limescale formation. This treatment can help improve the characteristics of hard water before it passes through the remaining filtration stages. Benefits include: Reduction of water hardness Reduced scale-forming potential Improved water conditioning The actual reduction in hardness depends on the incoming water quality and the remaining capacity of the cartridge. Stage 3 – AICRO-L4-AQ activated carbon and KDF cartridge The third stage combines coconut-shell granular activated carbon with KDF media. The activated carbon helps reduce free chlorine and selected organic compounds, improving the taste and smell of filtered water. KDF media provides additional treatment of certain dissolved metals, including iron, and has bacteriostatic properties that help inhibit bacterial growth within the cartridge. Key benefits include: Reduction of free chlorine Improved taste and odour Reduction of selected organic contaminants Reduction of certain heavy metals Bacteriostatic properties from KDF media Stage 4 – AIPRO-1M-AQ fine sediment filter The final stage uses a polypropylene sediment cartridge with a nominal 5-micron filtration rating. It provides additional mechanical filtration to capture finer suspended particles that may remain in the water after the earlier treatment stages. It helps reduce: Fine sediment Rust particles Sand Other suspended solids Optional ultrafiltration membrane upgrade The Aquafilter EXCITO-ST can be configured with an additional inline ultrafiltration membrane, such as the Aquafilter TLCHF-FP. This optional membrane uses hollow-fibre filtration technology with a nominal pore size of approximately 0.02 microns. It provides an additional filtration barrier for suspended particles and certain microorganisms. Important: The TLCHF-FP ultrafiltration membrane is not included with the standard EXCITO-ST system. It must be purchased separately and installed as an additional filtration stage. The system requires the appropriate pressure regulator when configured with an ultrafiltration membrane. See the installation requirements below. Compact under-sink installation The EXCITO-ST is designed to fit neatly inside the kitchen cabinet beneath your sink. Its enclosed casing houses the four inline filter cartridges, keeping the system organised and protected from everyday kitchen activity. The complete system is supplied assembled and includes a dedicated chrome drinking water tap and the necessary connection components for installation. Key installation features: Compact under-sink design Four replaceable inline cartridges Dedicated chrome drinking water tap 1/2-inch feed water connection 1/4-inch system connection tubing Quick-connect cartridge connections Replaceable cartridges for straightforward maintenance Key benefits Four-stage drinking water filtration Helps reduce sediment, rust and suspended particles Helps reduce chlorine and improve taste and odour Ion-exchange treatment to reduce water hardness Activated carbon and KDF filtration Helps reduce selected organic contaminants and certain heavy metals Compact design for installation beneath the kitchen sink Includes a dedicated drinking water tap Replaceable inline cartridges Compatible with an optional ultrafiltration membrane upgrade Technical specifications Specification Details Brand Aquafilter Model EXCITO-ST Product type Four-stage under-sink water filtration system Number of filtration stages 4 Stage 1 AIPRO-20M-AQ sediment cartridge Stage 2 AISTRO-L-AQ ion-exchange cartridge Stage 3 AICRO-L4-AQ activated carbon and KDF cartridge Stage 4 AIPRO-1M-AQ sediment cartridge First-stage filtration rating 20 microns Fourth-stage filtration rating 5 microns Filtration technologies Sediment, ion exchange, activated carbon and KDF Dimensions (H × W × L) 438 × 100 × 360 mm Feed water connection 1/2 inch System tubing 1/4 inch Flow rate 2.9 litres per minute Maximum working pressure 6 bar Working temperature 2–45°C Optional UF membrane TLCHF-FP, purchased separately Drinking water tap Included Installation accessories Feed water connector and tubing included Pressure regulator and installation requirements Correct pressure regulation is important for the safe operation of the EXCITO-ST. Aquafilter specifies a pressure regulator for the standard system: Standard EXCITO-ST configuration: PLV-0104-80 pressure regulator, rated at 80 psi (approximately 5.5 bar). EXCITO-ST configured with an ultrafiltration membrane: PLV-0104-50 pressure regulator, rated at 50 psi (approximately 3.45 bar). The pressure regulator is not included in the standard system package and must be purchased separately. Always follow the manufacturer's installation instructions and use the correct regulator for the chosen configuration. Cartridge replacement and maintenance Regular replacement of the filter cartridges helps maintain filtration performance and water quality. The EXCITO-ST uses four replaceable inline cartridges. Their service life depends on incoming water quality, water consumption, sediment levels and water hardness. Replace the cartridges in accordance with Aquafilter's maintenance guidance and sooner if you notice a reduction in water flow or a change in filtered water taste or odour. Replacement cartridge set: Aquafilter EXCITO-ST-CRT This four-piece replacement set contains: 1 × AIPRO-20M-AQ 1 × AISTRO-L-AQ 1 × AICRO-L4-AQ 1 × AIPRO-1M-AQ Package contents The Aquafilter EXCITO-ST system package includes: 1 × Aquafilter EXCITO-ST four-stage filtration unit 1 × AIPRO-20M-AQ sediment cartridge 1 × AISTRO-L-AQ ion-exchange cartridge 1 × AICRO-L4-AQ activated carbon and KDF cartridge 1 × AIPRO-1M-AQ sediment cartridge 1 × FXFCH17-C chrome drinking water tap 1 × 1/2-inch feed water connector 1/4-inch system connection tubing Installation instructions The system is supplied assembled and factory tested. Please note: The optional TLCHF-FP ultrafiltration membrane and pressure regulator are not included in the standard package.
€121,95
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Aquafilter Aquafilter EXCITO-HF-CRT – 3-Piece Replacement Cartridge Set for EXCITO-ST
Maintain your Aquafilter EXCITO-ST water filtration system with the Aquafilter EXCITO-HF-CRT 3-Piece Replacement Cartridge Set. Designed specifically for the EXCITO-ST system configured with the optional TLCHF-FP ultrafiltration membrane, this genuine Aquafilter cartridge set provides the pre-filtration, water conditioning and activated carbon treatment needed to support your drinking water filtration system. The three inline cartridges work alongside the separate TLCHF-FP ultrafiltration membrane to help reduce sediment, chlorine, selected organic substances, iron and certain heavy metals. The combination of sediment filtration, ion-exchange media, activated carbon and KDF helps improve filtered water taste and odour while providing additional water treatment. Designed for EXCITO-ST with an ultrafiltration membrane The EXCITO-HF-CRT is the dedicated three-cartridge replacement set for the Aquafilter EXCITO-ST system when used with the TLCHF-FP capillary ultrafiltration membrane. Unlike the standard four-cartridge EXCITO-ST-CRT set, this configuration uses a different second-stage cartridge and replaces the usual final sediment cartridge position with the separate ultrafiltration membrane. The three replacement cartridges are: 1 × AIPRO-20M-AQ sediment cartridge 1 × AIPRO-3-L-AQ multi-function conditioning cartridge 1 × AICRO-L4-AQ activated carbon and KDF cartridge Please note: The TLCHF-FP ultrafiltration membrane is not included in this three-piece cartridge set. It must be purchased separately. Three-stage replacement cartridge set Stage 1 – AIPRO-20M-AQ sediment cartridge The first cartridge uses polypropylene filtration media with a nominal 20-micron rating. It provides initial mechanical filtration, helping to reduce suspended particles before water passes through the subsequent treatment stages. It helps capture: Sand Silt Rust particles Sediment Other suspended solids This pre-filtration stage helps protect the downstream cartridges and ultrafiltration membrane from larger particles. Stage 2 – AIPRO-3-L-AQ multi-function conditioning cartridge The second cartridge combines several filtration media to provide additional water conditioning. Its layered construction incorporates polypropylene foam, conditioning media and ion-exchange media. It is designed to help reduce suspended particles, iron and iron derivatives, while also reducing water hardness. Benefits include: Additional sediment filtration Reduction of iron and selected iron compounds Ion-exchange treatment to reduce water hardness Improved water conditioning before the final treatment stage Actual performance depends on incoming water quality, contaminant levels and cartridge condition. Stage 3 – AICRO-L4-AQ activated carbon and KDF cartridge The final cartridge combines granular activated carbon with KDF media. Activated carbon helps reduce free chlorine and selected organic compounds, improving the taste and smell of filtered water. KDF media provides additional treatment of certain dissolved metals and has bacteriostatic properties that help inhibit bacterial growth within the cartridge. Benefits include: Reduction of free chlorine Improved taste and odour Reduction of selected organic substances Treatment of certain metals, including iron and heavy metals Bacteriostatic properties from KDF media Compatible with the TLCHF-FP ultrafiltration membrane This three-cartridge set is designed to operate alongside the Aquafilter TLCHF-FP capillary ultrafiltration membrane. The optional membrane provides an additional filtration barrier using hollow-fibre technology. It is designed to retain fine suspended particles and certain microorganisms. When used together, the three cartridges and UF membrane provide a four-stage filtration arrangement for the EXCITO-ST system. Important: The TLCHF-FP membrane is sold separately and is not included in this product. This listing is for the three replacement cartridges only. Genuine Aquafilter replacement cartridges Using the correct replacement cartridges helps maintain the intended filtration configuration of your EXCITO-ST system. The EXCITO-HF-CRT set is designed for the EXCITO-ST configuration with the TLCHF-FP membrane. It should not be confused with the standard EXCITO-ST-CRT four-cartridge replacement set. Check your existing system configuration before ordering to ensure you select the correct replacement set. Product benefits Genuine Aquafilter replacement cartridge set Three inline cartridges for the EXCITO-ST system Designed for use with the optional TLCHF-FP ultrafiltration membrane Helps reduce sediment, sand, silt and rust Helps reduce iron and selected iron compounds Ion-exchange media helps reduce water hardness Activated carbon helps reduce chlorine and improve taste and odour KDF media provides additional treatment of certain metals 1/4-inch NPT connections Compact 2.5 × 12-inch cartridge format Technical specifications Specification Details Brand Aquafilter Cartridge set model EXCITO-HF-CRT Compatible system Aquafilter EXCITO-ST Set contents 3 inline filter cartridges Cartridge 1 AIPRO-20M-AQ Cartridge 2 AIPRO-3-L-AQ Cartridge 3 AICRO-L4-AQ Filtration media Polypropylene, conditioning media, ion exchange, activated carbon and KDF Nominal micron rating 20 microns Cartridge size 2.5 × 12 inches Connection type 1/4-inch NPT UF membrane compatibility TLCHF-FP UF membrane included No Application Replacement cartridges for EXCITO-ST under-sink filtration system Installation and maintenance Before replacing the cartridges, shut off the water supply and follow the Aquafilter installation instructions for your EXCITO-ST system. When fitting the new cartridges: Check the model and connection compatibility before installation. Observe the direction-of-flow arrow marked on each cartridge. Ensure all threaded connections are properly sealed. Check all connections for leaks after restoring the water supply. Flush the system after cartridge replacement before using the filtered water. Aquafilter also specifies that the EXCITO-ST system must be protected against pressure surges using the appropriate pressure regulator. For an EXCITO-ST system fitted with the TLCHF-FP ultrafiltration membrane, Aquafilter specifies the PLV-0104-50 regulator (50 psi / approximately 3.3 bar). The regulator is not included with the system. Always follow the manufacturer's installation and maintenance instructions. Package contents 1 × AIPRO-20M-AQ sediment cartridge 1 × AIPRO-3-L-AQ multi-function conditioning cartridge 1 × AICRO-L4-AQ activated carbon and KDF cartridge Not included: Aquafilter TLCHF-FP ultrafiltration membrane, EXCITO-ST filtration unit, pressure regulator or additional installation accessories.
€18,95
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Aquafilter Aquafilter EXCITO-CRT – 4-Piece Replacement Cartridge Set for EXCITO-ST
Keep your Aquafilter EXCITO-ST water filtration system performing effectively with the Aquafilter EXCITO-CRT 4-Piece Replacement Cartridge Set. This genuine Aquafilter replacement set contains four inline cartridges designed to provide sediment filtration, chlorine reduction and activated carbon treatment for compatible EXCITO-ST under-sink water filtration systems. Combining polypropylene sediment filtration, coconut-shell granular activated carbon and specialist KDF media, the four cartridges help reduce suspended particles, chlorine, selected organic compounds and certain heavy metals. They also help improve the taste and smell of filtered drinking water. Four-stage replacement filtration The Aquafilter EXCITO-CRT contains four replaceable inline cartridges: 1 × AIPRO-20M-AQ sediment cartridge 1 × AIPRO-1M-AQ fine sediment cartridge 1 × AICRO-L-AQ activated carbon cartridge 1 × AICRO-L4-AQ activated carbon and KDF cartridge Each cartridge performs a different filtration function, helping maintain the treatment sequence of the EXCITO-ST system. Stage 1 – AIPRO-20M-AQ sediment cartridge The first stage uses polypropylene filtration media to reduce larger suspended particles in the incoming water. It helps capture: Sand Silt Rust Suspended solids Other visible sediment This initial filtration stage helps protect the downstream cartridges from larger particles. Stage 2 – AIPRO-1M-AQ fine sediment cartridge The second stage provides additional mechanical filtration using polypropylene media. With a nominal 5-micron rating, it helps capture finer suspended particles that may pass through the first sediment cartridge. It helps reduce: Fine sediment Rust particles Sand Other suspended solids This additional filtration helps prepare the water for the activated carbon stages. Stage 3 – AICRO-L-AQ coconut-shell activated carbon cartridge The third stage contains granular activated carbon made from coconut shells. Activated carbon helps reduce free chlorine, selected organic compounds and certain pesticides. It also helps improve the taste and aroma of filtered water. Key benefits include: Chlorine reduction Improved taste and odour Reduction of selected organic substances Reduction of certain pesticides The carbon media provides adsorption treatment as water passes through the cartridge. Stage 4 – AICRO-L4-AQ activated carbon and KDF cartridge The final stage combines granular activated carbon with KDF media. The activated carbon provides further reduction of chlorine and selected organic compounds, while KDF media uses oxidation-reduction reactions to help reduce certain dissolved metals. Depending on incoming water conditions, the media can help treat: Iron Copper Lead Mercury Arsenic Hydrogen sulphide Other selected dissolved contaminants KDF also has bacteriostatic properties that help inhibit bacterial growth within the cartridge. This should not be confused with sterilisation or guaranteed disinfection of drinking water. Compatible with Aquafilter EXCITO-ST systems The EXCITO-CRT is one of Aquafilter's four-cartridge replacement configurations for the EXCITO-ST system. It is particularly important to distinguish this set from the standard EXCITO-ST-CRT replacement set. The EXCITO-CRT contains: Two polypropylene sediment cartridges One coconut-shell activated carbon cartridge One activated carbon and KDF cartridge Unlike EXCITO-ST-CRT, this configuration does not contain the AISTRO-L-AQ ion-exchange water-softening cartridge. Check the cartridge models in your existing system before ordering to ensure compatibility. Product benefits Genuine Aquafilter four-piece replacement set Designed for compatible EXCITO-ST systems Two-stage sediment filtration Coconut-shell granular activated carbon Additional carbon and KDF treatment Helps reduce chlorine and improve taste and odour Helps reduce selected organic compounds and pesticides Helps reduce certain dissolved metals 1/4-inch NPT connections Compact 2.5 × 12-inch inline cartridge format Technical specifications Specification Details Brand Aquafilter Model EXCITO-CRT Product type Four-piece inline replacement cartridge set Compatible system Aquafilter EXCITO-ST Number of cartridges 4 Cartridge 1 AIPRO-20M-AQ Cartridge 2 AIPRO-1M-AQ Cartridge 3 AICRO-L-AQ Cartridge 4 AICRO-L4-AQ Sediment media Polypropylene Carbon media Coconut-shell granular activated carbon Additional treatment media KDF Nominal micron rating 5 microns Cartridge size 2.5 × 12 inches Connection type 1/4-inch NPT Application Under-sink drinking water filtration The 5-micron rating relates to the fine sediment filtration stage; it should not be interpreted as the filtration rating of every cartridge in the set. Installation and maintenance Replace the cartridges in accordance with Aquafilter's installation and maintenance instructions. Before installation: Shut off the water supply. Check that the replacement cartridge models match your existing configuration. Confirm that the threaded connections and fittings are compatible. Follow the correct water-flow direction marked on each cartridge. After installation, restore the water supply carefully and check all connections for leaks. Flush the system according to the manufacturer's instructions before drinking the filtered water. Cartridge service life depends on incoming water quality, sediment levels, contaminant concentrations and household water consumption. Replace cartridges according to the manufacturer's recommended maintenance schedule and sooner if water flow or taste deteriorates. Package contents 1 × AIPRO-20M-AQ sediment cartridge 1 × AIPRO-1M-AQ fine sediment cartridge 1 × AICRO-L-AQ activated carbon cartridge 1 × AICRO-L4-AQ activated carbon and KDF cartridge Please note: This listing is for the four replacement cartridges only. The EXCITO-ST filtration unit, drinking water tap, fittings and additional accessories are not included.
€35,95
Improve your home's drinking water with a quality under-sink water filtration system from GroAqua. Designed to fit discreetly inside a kitchen cupboard, under-sink water filters provide a convenient way to reduce unwanted impurities and improve the taste and odour of tap water.
Unlike countertop filtration systems, under-counter water filters are installed out of sight, helping keep your kitchen worktop clear while providing filtered water through a dedicated drinking water tap.
At GroAqua, we offer a selection of domestic under-sink water filtration systems, including multi-stage filtration and ultrafiltration solutions from established manufacturers such as Aquafilter.
Whether you want to reduce chlorine, sediment, heavy metals or other unwanted substances, explore our collection to find a suitable water filtration system for your household.
What Is an Under-Sink Water Filter?
An under-sink water filter is a domestic water filtration system installed beneath a kitchen sink. It connects to the incoming cold water supply and treats water before delivering it through a separate drinking water tap.
These systems use different filtration technologies depending on the contaminants they are designed to reduce.
Common filtration technologies include:
- Sediment filtration to capture sand, rust and suspended particles.
- Activated carbon filtration to reduce chlorine, certain organic compounds and unpleasant tastes and odours.
- Specialist filtration media for reducing selected heavy metals and other contaminants.
- Ultrafiltration membranes to reduce fine suspended particles and microorganisms, depending on the membrane specifications.
- Water softening cartridges to reduce certain hardness minerals.
- Scale inhibition technology to help manage limescale formation.
The filtration stages can be combined to create a multi-stage water purification system tailored to particular water quality requirements.
Benefits of Under-Sink Water Filtration Systems
Installing an under-counter water filter offers several advantages for everyday household water use.
1. Improved Drinking Water Taste and Odour
Activated carbon filters help reduce chlorine and certain organic compounds that can affect the taste and smell of tap water.
This can make filtered water more pleasant for drinking, cooking and preparing hot beverages.
2. Reduction of Sediment and Suspended Particles
Sediment filtration helps capture particles such as sand, rust, silt and other suspended solids.
Removing these particles helps improve water clarity and protects downstream filtration components.
3. Targeted Contaminant Reduction
Depending on the filtration technology, under-sink water filters can help reduce selected heavy metals, iron, certain organic substances and other unwanted contaminants.
Choosing the correct filtration system is important because different cartridges are designed for different water quality issues.
4. Compact and Discreet Installation
Under-sink systems are designed to fit inside kitchen cupboards, keeping the filtration equipment hidden from view.
This makes them an excellent option for homeowners who want filtered drinking water without taking up valuable worktop space.
5. Convenient Access to Filtered Water
Most under-sink filtration systems connect to a dedicated drinking water tap.
This allows you to access filtered water directly from your kitchen without needing to fill jugs or use countertop filtration equipment.
6. Multiple Filtration Options
Modern under-sink systems can combine several treatment stages, allowing different filtration technologies to work together.
Depending on the model, these may include sediment filters, carbon cartridges, specialist filtration media and ultrafiltration membranes.
Types of Under-Sink Water Filtration Systems
There are several types of under-counter water filters available, each designed to address different water quality requirements.
Multi-Stage Under-Sink Water Filters
Multi-stage water filtration systems use several cartridges to treat water through a sequence of filtration processes.
Each stage performs a different function, helping reduce a wider range of unwanted substances.
For example, a multi-stage system may include:
- A sediment cartridge to capture suspended particles.
- A water conditioning cartridge to reduce selected hardness minerals.
- An activated carbon cartridge to reduce chlorine and organic compounds.
- An additional filtration cartridge for targeted contaminant reduction.
- An ultrafiltration membrane for further filtration.
The exact configuration depends on the manufacturer and model.
Aquafilter EXCITO-B is an example of a multi-stage under-sink water filtration system designed to combine different treatment technologies within one compact installation.
Ultrafiltration Water Filters
Ultrafiltration (UF) is a membrane-based filtration technology that uses very small membrane pores to reduce suspended particles and microorganisms.
UF systems are particularly useful for applications where additional filtration of fine particles and microbiological contaminants is required.
Unlike reverse osmosis, ultrafiltration does not generally remove dissolved salts and minerals to the same extent.
This makes UF an alternative for households looking for membrane filtration while retaining most naturally occurring dissolved minerals.
The actual filtration performance depends on the membrane specifications and system design.
Under-Sink Chlorine Reduction Filters
Activated carbon filtration is commonly used to reduce free chlorine and certain organic compounds in drinking water.
Chlorine is widely used in municipal water treatment as a disinfectant, but it can influence the taste and smell of tap water.
An under-sink carbon filter provides a convenient way to reduce chlorine at the kitchen drinking water outlet.
Under-Sink Heavy Metal Reduction Filters
Some specialist under-sink water filtration systems use dedicated filtration media designed to reduce selected heavy metals.
Depending on the cartridge specifications, these systems may target substances such as lead, mercury, cadmium and arsenic.
If heavy metal contamination is a concern, water testing is recommended to identify the specific contaminants and determine the most appropriate treatment technology.
Under-Sink Water Softening and Scale Reduction Filters
Hard water contains dissolved calcium and magnesium, which can contribute to limescale formation.
Certain under-sink filtration cartridges use specialist media to reduce hardness minerals or help manage scale formation.
It is important to distinguish between water softening and scale inhibition, as these technologies work differently.
For significant water hardness throughout a property, a dedicated whole-house water softener may be more suitable.
Aquafilter Under-Sink Water Filtration Systems
GroAqua offers a selection of under-sink water filtration products from Aquafilter, a recognised manufacturer of domestic water treatment equipment.
The collection includes Aquafilter EXCITO-B and EXCITO-ST systems, designed to provide multi-stage filtration in a compact under-counter configuration.
Aquafilter EXCITO-B Water Filtration System
The Aquafilter EXCITO-B is a multi-stage under-sink water filtration system designed for domestic drinking water applications.
Its cartridge configuration combines different filtration technologies to help reduce sediment, chlorine, selected organic compounds, iron and heavy metals.
Depending on the cartridge configuration, the system can also incorporate ultrafiltration technology for additional treatment.
The EXCITO-B uses a quick-change cartridge arrangement, making routine cartridge replacement more convenient.
It is a practical option for households looking for a comprehensive multi-stage filtration system beneath the kitchen sink.
Aquafilter EXCITO-ST Water Filtration System
The Aquafilter EXCITO-ST is a compact multi-stage under-sink water filter designed to improve domestic drinking water quality.
Its filtration configuration combines sediment and carbon filtration with additional treatment stages to reduce selected unwanted substances.
The system uses replaceable inline cartridges, making it suitable for households looking for a convenient and space-saving filtration solution.
Aquafilter Replacement Filter Cartridges
Regular maintenance is important for keeping an under-sink filtration system working efficiently.
GroAqua also offers replacement cartridges and filter sets for selected Aquafilter systems, including EXCITO-B and EXCITO-ST models.
Using compatible replacement cartridges helps maintain the intended filtration performance and extends the useful service life of your equipment.
Always check the cartridge model and connection type before purchasing replacement filters.
How to Choose the Best Under-Sink Water Filter for Your Home
Choosing the right under-sink water filtration system depends on your water quality, household requirements and preferred filtration technology.
Consider the following factors before purchasing.
1. Identify Your Water Quality Requirements
Start by considering what you want to improve about your tap water.
For example:
- Chlorine taste and odour: Consider activated carbon filtration.
- Sediment and rust: Consider a suitable sediment cartridge.
- Selected heavy metals: Look for specialist reduction cartridges with verified performance specifications.
- Microbiological contaminants: Consider an appropriately certified ultrafiltration or other validated treatment system.
- Water hardness: Consider suitable softening technology.
If you are unsure about your water quality, consider arranging a water analysis before choosing a system.
2. Consider the Filtration Technology
Different systems use different combinations of filtration technologies.
Carbon filtration, sediment filtration, ultrafiltration and reverse osmosis all perform different functions.
Choose a system based on the contaminants you want to reduce rather than simply selecting the system with the greatest number of filtration stages.
3. Check Available Installation Space
Measure the space beneath your kitchen sink before purchasing.
Check the system dimensions and allow sufficient room for connecting pipes, accessing cartridges and carrying out routine maintenance.
4. Check Water Pressure and Flow Rate
Every filtration system has specific operating pressure and flow rate requirements.
Check the manufacturer's specifications to ensure the system is suitable for your plumbing installation and expected water consumption.
5. Consider Replacement Cartridge Availability
Replacement filters are an important part of long-term ownership.
Before purchasing, check the availability and cost of compatible replacement cartridges and the recommended maintenance intervals.
6. Decide Whether You Need Ultrafiltration or Reverse Osmosis
Ultrafiltration and reverse osmosis are both membrane-based filtration technologies, but they work differently.
Ultrafiltration reduces suspended particles and microorganisms while generally retaining dissolved minerals.
Reverse osmosis reduces a much broader range of dissolved substances, including many dissolved salts and minerals.
The most appropriate option depends on your incoming water quality and desired filtration performance.
Under-Sink Water Filters vs Countertop Water Filters
Both under-sink and countertop water filtration systems provide convenient access to filtered drinking water, but their installation requirements are different.
Under-Sink Water Filters
- Installed inside a kitchen cupboard.
- Keep the kitchen worktop clear.
- Usually connect to a dedicated drinking water tap.
- Can accommodate multi-stage filtration systems.
- Require plumbing connections beneath the sink.
Countertop Water Filters
- Installed directly on the kitchen worktop.
- Often connect to an existing kitchen tap.
- Require little or no cupboard space.
- Can be suitable for rented properties or simpler installations.
The right choice depends on your kitchen layout, installation preferences and filtration requirements.
Why Choose GroAqua for Under-Sink Water Filters?
At GroAqua, we specialise in water treatment and filtration equipment for domestic, commercial and industrial applications.
Our under-sink water filtration collection includes selected products from established manufacturers, including Aquafilter.
Whether you are looking for a compact drinking water filter, a multi-stage filtration system or replacement cartridges, we offer practical solutions for different domestic water treatment requirements.
When shopping with GroAqua, you can benefit from:
- A selection of domestic under-sink water filters.
- Multi-stage filtration systems.
- Ultrafiltration water treatment solutions.
- Chlorine and taste reduction filters.
- Specialist heavy metal reduction options.
- Water softening and scale reduction cartridges.
- Replacement filters for selected Aquafilter systems.
- Specialist knowledge of water filtration and treatment.
Explore our collection and find an under-counter water filtration solution suited to your home.
Frequently Asked Questions About Under-Sink Water Filters
What is the best under-sink water filter for home use?
The best under-sink water filter depends on your incoming water quality and the contaminants you want to reduce. Multi-stage carbon and sediment filtration systems are popular for improving taste and reducing particles, while ultrafiltration and reverse osmosis systems offer different levels of membrane filtration.
Do under-sink water filters remove chlorine?
Many under-sink water filters use activated carbon cartridges designed to reduce free chlorine and certain organic compounds. Check the manufacturer's specifications for the exact reduction performance.
Are under-sink water filters easy to install?
Most domestic under-sink systems are designed for installation inside a kitchen cupboard and connect to the cold water supply. Installation requirements vary between models, and some systems require a dedicated drinking water tap.
What is the difference between under-sink filtration and reverse osmosis?
Standard under-sink filtration systems often use sediment and activated carbon cartridges to reduce particles, chlorine and selected contaminants.
Reverse osmosis systems use a semi-permeable membrane to reduce dissolved salts and a wider range of dissolved substances.
Both options are suitable for different domestic water treatment requirements.
Does ultrafiltration remove bacteria?
Suitable ultrafiltration membranes can reduce bacteria and other microorganisms, depending on their pore size, integrity and validated performance. Always check the manufacturer's specifications and certification. Ultrafiltration should not automatically be considered a complete disinfection solution.
How often should under-sink water filter cartridges be replaced?
Replacement intervals depend on the cartridge type, water quality, household consumption and manufacturer recommendations.
Some cartridges require replacement every six months, while others have longer service lives. Always follow the maintenance instructions for your particular system.
Can I replace under-sink filter cartridges myself?
Many domestic under-sink systems use quick-change cartridges designed for straightforward replacement. Follow the manufacturer's instructions, isolate the water supply where required and check all connections for leaks after servicing.
Do under-sink water filters need electricity?
Most standard under-sink sediment and carbon filtration systems operate using mains water pressure and do not require electricity.
Some advanced systems may require electrical power for additional features, pumps or electronic controls. Check the individual product specifications.
Do under-sink water filters remove limescale?
Some under-sink cartridges contain specialist media designed to reduce hardness minerals or inhibit scale formation. However, standard sediment and carbon filters do not remove dissolved calcium and magnesium. For significant hardness problems, a dedicated water softener may be more appropriate.
Shop Under-Sink Water Filters at GroAqua
Discover GroAqua's selection of under-sink water filtration systems and enjoy the convenience of filtered drinking water directly from your kitchen.
From compact Aquafilter EXCITO systems to multi-stage filtration solutions and replacement cartridges, our collection offers practical options for improving your home's drinking water quality.
Browse our under-counter water filters today and find the right filtration solution for your household.