Inline Water Filters & Replacement Cartridges

Shop inline water filters and replacement cartridges for domestic water filtration systems and appliances. Our range includes activated carbon filters, ultrafiltration membranes, mineralising cartridges and water-softening filters from Aquafilter.

Designed to connect directly to compatible water lines, inline cartridges offer a compact filtration solution for drinking water systems, reverse osmosis units, refrigerators and selected appliances. Choose the right cartridge for your system, connection size and water treatment requirements.


  • Aquafilter TLCHF-2T In-line ultrafiltration membrane 0.01 micron cartridge 1/4" NPT Sediment Cartridge Aquafilter

    Aquafilter Aquafilter TLCHF-2T In-line ultrafiltration membrane 0.01 micron cartridge 1/4" NPT

    Aquafilter TLCHF-2T In-line ultrafiltration membrane 0.01 micron cartridge 1/4" NPT. Compatible with most under-counter systems available on the market. Due to the small pore size (0,02 micron) in combination with its unique structure, which decreases from the outside to the inside, the membrane is capable of removing various contaminants such as: sand, silt, rust and other suspended impurities, most bacteria, and some viruses. Large sediment particles are blocked near the capillary surface (surface filtration) and smaller ones flow inside until they are captured by smaller pores (depth filtration). Unlike RO membranes, UF membranes are characterized by zero rejection ratio which in turn leads to quicker and more efficient delivery of clean water. Moreover hollow fiber UF membranes leave beneficial minerals intact. TLCHF-2TF is designed for cold potable water filtration. Aquafilter TLCHF-2TF Ultra filtration membrane. Fits most 1/4” water lines and requires no additional tools for installation.Specifications: Size: 10" x 2" Micron rating: 0.02 microns Filter Life: 6-12 months Max pressure: 3,5 bar Min temp.: 2'C Max temp.: 45'C

    £19.24

  • Aquafilter AICRO 10" In line GAC Carbon Filter Aquafilter

    Aquafilter Aquafilter AICRO 10" In line GAC

    Aquafilter AICRO 10" In-line cartridge with coconut shell granulated activated carbon (GAC). It is mostly used for RO systems in order to improve the taste and aroma of filtered water. It can also be installed in "SIDE-BY-SIDE" type refrigerators to reduce chlorine, organic substances and certain pesticides. Available with 1/4" NPT connection.

    £3.39

  • EXCITO-B-CLR-CRT – A set of 4 replaceable in-line cartridges Filter Set Aquafilter

    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.

    £23.90

  • Aquafilter AIMRO In-line water mineralizer cartridge Mineralization Cartridge Aquafilter

    Aquafilter Aquafilter AIMRO In-line water mineralizer cartridge

    Aquafilter AIMRO in-line cartridge fits most 1/4” water lines and requires no additional tools for installation. Water passing through several stages is enriched with natural microelements such as calcium and magnesium. These beneficial minerals and nutrients are added back (after being removed by RO) to water to create a mineralized, pH-balanced result. These media alkalize and remineralize water, raising its pH. They reduce acidity in the body and produce natural calcium and magnesium ions that can be absorbed by the human body. These Essential Minerals are vital to our organs. Calcium is beneficial for bones, teeth, heart and muscular system. Magnesium participates in over 300 biochemical processes beneficial to immunological and nervous systems. Lack of these essential minerals may cause: Fatigue, Insomnia, hair loss, Depression, Diabetes, High Blood Pressure, Asthma, tooth decay, PMS, Migraines, Heart Disease. Cartridges include pre- and post-filters preventing media particles from being washed out.Specifications: Media: calcium carbonate and magnesium oxide Operating Pressure: 6 bar Minimum Temperature: 2ºC Maximum Temperature: 45°C Body, Cap, Pre-filter and Post-filter: Polypropylene Amount of minerals released into water Ca2+ - 28 mg/l Mg2+ - 3,5 mg/l OH- - 9 mg/l

    £5.33

  • Aquafilter AIFIR-200 In-line ionizing water cartridge - GroAqua

    Aquafilter Aquafilter AIFIR-200 In-line ionizing water cartridge

    Increase pH Levels Experience cleaner and healthier drinking water with the Aquafilter AIFIR-200 In-line ionizing water cartridge. This innovative inline water filter is designed to increase the pH levels of your tap water, providing you with alkaline water that is beneficial for your health. By using an ionizer, this cartridge helps to balance the pH levels of your water, resulting in a refreshing and revitalizing drinking experience. Convenient Inline Design Say goodbye to bulky and cumbersome water filters with the Aquafilter AIFIR-200. This in-line water cartridge can easily be installed in your existing water filtration system, ensuring that you have access to clean and ionized water whenever you need it. The compact design of this cartridge makes it easy to install and maintain, allowing you to enjoy the benefits of ionized water without any hassle. Premium Water Filtration Trust the Aquafilter AIFIR-200 to provide you with premium water filtration that is both effective and reliable. This ionizing water cartridge is made from high-quality materials that are designed to remove impurities and contaminants from your water, leaving you with pure and clean drinking water. Improve the taste and quality of your water with the Aquafilter AIFIR-200 in-line ionizing water cartridge.

    £20.03

  • Aquafilter AIFIR2000 In-line negative ionizer cartridge Mineralization Cartridge Aquafilter

    Aquafilter Aquafilter AIFIR2000 In-line negative ionizer cartridge

    In-line Water Filter The Aquafilter AIFIR2000 In-line negative ionizer cartridge is designed to be an efficient solution for improving the quality of your water. This in-line water filter easily connects to your existing water system, providing a continuous flow of clean and purified water for drinking, cooking, and more. Negative Ionizer Equipped with a negative ionizer feature, this cartridge releases negatively charged ions into the water, effectively neutralizing harmful pollutants and toxins. The negative ionization process helps to reduce chlorine, heavy metals, and other contaminants, resulting in healthier and better-tasting water for you and your family. Easy Installation This innovative in-line cartridge is simple to install and fits seamlessly into most standard water filtration systems. With its durable construction and long-lasting performance, the Aquafilter AIFIR2000 provides a cost-effective and convenient solution for maintaining clean and pure water throughout your home or office.

    £17.33

  • Aquafilter AICRO-AB 2″ x 10″ In-line Cartridge Coconut Shell Activated Carbon Carbon Cartridge Aquafilter

    Aquafilter Aquafilter AICRO-AB 2″ x 10″ In-line Cartridge Coconut Shell Activated Carbon

    Protect your home, health, and appliances by filtering your water. The ACC-2 Aquafilter Granular Activated Carbon Filter removes major contaminants from your water supply and provides clean water for drinking, showering, cooking, and other home uses. The GAC removes major water contaminants like Chlorine, Total Organic Carbon (TOC), Pharmaceuticals, Turbidity, Volatile Organic Chemicals (VOC), Herbicides, Industrial Solvents, Insecticides, Pesticides, and Chemicals causing bad tastes, odours, and more. The UDF type filter is vacuum sealed and complete with a polypropylene shell, a thermal bonded cap, and an industrial sealed silicon ring to make sure its durable and reliable. Filter your water with high quality coconut carbon for maximum chemical absorption. Choose the filter that lasts longer to give you the best value in filtration. Aquafilter offers AICRO-AB In-line Granular carbon cartridge with antimicrobial agent suitable for POU (Point of Use) installations. Through its granular activated carbon (GAC) media, AICRO-AB significantly reduces the concentration of chlorine, heavy metals such as, copper, lead, mercury, as well as VOC’s, improving the taste and odour of your drinking water. Additionally, AICRO-AB is provided with nano silver BACINIXTM, an antimicrobial agent which confers protection against bacteria and viruses, ensuring a continuous supply of fresh and clean drinking water.

    £7.25

  • Aquafilter AICRO-QC Inline 2” x 10” Filter With Activated Carbon GAC – 1/4″ QC Carbon Filter Aquafilter

    Aquafilter Aquafilter AICRO-QC Inline 2” x 10” Filter With Activated Carbon GAC – 1/4″ QC

    Protect your home, health, and appliances by filtering your water. The ACC-2 Aquafilter Granular Activated Carbon Filter removes major contaminants from your water supply and provides clean water for drinking, showering, cooking, and other home uses. The GAC removes major water contaminants like Chlorine, Total Organic Carbon (TOC), Pharmaceuticals, Turbidity, Volatile Organic Chemicals (VOC), Herbicides, Industrial Solvents, Insecticides, Pesticides, and Chemicals causing bad tastes, odors, and more. The UDF type filter is vacuum sealed and complete with a polypropylene shell, a thermal bonded cap, and an industrial sealed silicon ring to make sure its durable and reliable. Filter your water with high quality coconut carbon for maximum chemical absorption. Choose the filter that lasts longer to give you the best value in filtration. 2" x 10" in-line cartridge with coconut shell granulated activated carbon (GAC). It is mostly used for RO systems in order to improve the taste and aroma of filtered water. It can also be installed in "SIDE-BY-SIDE" type refrigerators to reduce chlorine, organic substances and certain pesticides.       Available sizes: 2" x 10"

    £5.49

  • Aquafilter FHPRA Washing machine filter with brass insert Washing Machine Filter Aquafilter

    Aquafilter Aquafilter FHPRA Washing machine filter with brass insert

    Aquafilter FHPRA series - washing machine filter. Are filled with polyphosphate, antiscale and anti-lime media. Polyphosphate prevents scale by reacting with dissolved hardness minerals (e.g. calcium carbonate and calcium bicarbonate) and transforming them into harmless, microscopic crystals of calcium orthophosphate. These crystals stay suspended in water and will not create scale build-up in heating elements, pipes, water heaters, boilers, etc. Moreover polyphosphate helps to deal with iron and all the problems which it causes. Polyphosphates do not remove iron from water. Rather they stabilize and disperse the iron so that the water remains clear and does not produce iron stains. The FHPRA series filter cartridges require very little maintenance, no backwashing and no salt. Cartridges include pre- and post-filters preventing media particles from being washed out. FHPRA is designed for use with cold tap water. This filter should be installed between water supply valve and washing machine using connection adapter 3/4"male x 3/4" FIP.

    £6.04

  • Aquafilter AIMRO-QC in-line Mineralizing Cartridge 2″ x 10″ - GroAqua

    Aquafilter Aquafilter AIMRO-QC in-line Mineralizing Cartridge 2″ x 10″

    After RO mineral cartridge, water passing through several stages is enriched with natural microelements such as calcium and magnesium. These beneficial minerals and nutrients are added back (after being removed by RO) to water to create a mineralized, pH-balanced result. These media alkalize and remineralize water, raising its pH. They reduce acidity in the body and produce natural calcium and magnesium ions that can be absorbed by the human body.  In-line mineralizing cartridge. Mainly used after RO filtration. Enriches water with minerals essential for human organism, such as calcium and magnesium. Available with 1/4" QC connection.Available size: 2" x 10"

    £7.86

  • EXCITO-ST-CRT – Set of 4 replaceable in-line cartridges Filter Set Aquafilter

    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.

    £23.35

  • Aquafilter AISTRO-L-AQ 2,5" x 12" in-line water softening cartridge - GroAqua

    Aquafilter Aquafilter AISTRO-L-AQ 2,5" x 12" in-line water softening cartridge

    Highly Effective Inline Water Filter Inline water filters are an essential tool for improving the quality of your tap water. The Aquafilter AISTRO-L-AQ 2,5" x 12" in-line water softening cartridge is designed to effectively reduce calcium and magnesium ions in your water, resulting in softer water that is gentler on your skin and appliances. Superior Water Softening Say goodbye to dry skin and scale buildup on your fixtures with the Aquafilter AISTRO-L-AQ 2,5" x 12" in-line water softening cartridge. This high-quality filter is specifically engineered to target and reduce the minerals that cause hard water, providing you with a continuous supply of softened water for all your daily needs. Easy Installation and Maintenance Installing and maintaining the Aquafilter AISTRO-L-AQ 2,5" x 12" in-line water softening cartridge is a breeze. Simply follow the instructions provided, and you'll be enjoying the benefits of softer, cleaner water in no time. With regular cartridge replacements, you can ensure that your water remains free from calcium and other impurities.

    £4.19

  • Aquafilter AISTRO-DI 10" In-line water demineralizing cartridge 1/4" NPT Resin Cartridge Aquafilter

    Aquafilter Aquafilter AISTRO-DI 10" In-line water demineralizing cartridge 1/4" NPT

    Efficient Inline Water Filtration Aquafilter AISTRO-DI 10 is a top-of-the-line in-line water demineralizing cartridge designed to provide you with clean and safe drinking water. This cartridge is equipped with 1/4" NPT fittings for easy installation and compatibility with most standard water filtration systems. The demineralizer technology effectively removes impurities and contaminants from your water, ensuring that you and your family enjoy the purest drinking water possible. Convenient Installation Process Installing the Aquafilter AISTRO-DI 10 inline water demineralizing cartridge is a breeze. Simply connect the cartridge to your existing water filtration system using the 1/4" NPT fittings and enjoy instant access to clean and refreshing drinking water. The compact design of the cartridge ensures a seamless fit into any space, making it a convenient and practical addition to your home or office water filtration setup. Long-Lasting Demineralizing Technology The Aquafilter AISTRO-DI 10 inline water demineralizing cartridge is built to last, providing you with long-term water purification and peace of mind. With its advanced demineralizer technology, this cartridge effectively removes impurities and minerals from your water, leaving you with pure and great-tasting drinking water. Say goodbye to bottled water and switch to the Aquafilter AISTRO-DI 10 for all your water filtration needs.

    £4.19

  • Aquafilter AIPRO-20M-AQ Sediment In-line Cartridge Sediment Cartridge Aquafilter

    Aquafilter Aquafilter AIPRO-20M-AQ Sediment In-line Cartridge

    he construction of this pure polypropylene, surfactant-free depth filter ensures low pressure drops, with exceptional dirt holding capabilities. ACS-1 series uses no resin binders, lubricants, antistatic or release agents or other chemical additives.The one-step manufacturing process continuously extrudes and thermally bonds pure polypropylene microfibres into a complex filter matrix. Cartridges are characterized by excellent sediment absorption of sand, silt, rust and suspended solids from potable water. In-line sediment filter cartridge, which removes sediments such as sand, silt, rust and suspended solids. Available with 1/4" NPT connection.         Available sizes: 2,5" x 12"Available micron rating: 5

    £4.19

  • Aquafilter In-Line External 5 Micron Sediment Removal Water Filter AIPRO Sediment Cartridge Aquafilter

    Aquafilter Aquafilter In-Line External 5 Micron Sediment Removal Water Filter AIPRO

    Efficient Sediment Removal Upgrade your water filtration system with the Aquafilter In-Line External 5 Micron Sediment Removal Water Filter AIPRO. This inline water filter effectively removes sediment, dirt, rust particles, and other impurities from your water supply, ensuring cleaner and safer water for you and your family. Say goodbye to cloudy or foul-tasting water with this high-quality filtration solution. Simple Installation Process This Aquafilter water filter is designed for easy installation and maintenance. It can be seamlessly integrated into your existing fridge filter system or used as a standalone filtration solution. With its compact and space-saving design, you can enjoy the benefits of clean, filtered water without any hassle. Keep your water supply free from contaminants with this convenient and reliable inline water filter. Long-Lasting Performance With its durable construction and efficient filtration capabilities, the Aquafilter In-Line External 5 Micron Sediment Removal Water Filter AIPRO is built to last. Enjoy peace of mind knowing that your water is consistently being filtered to remove impurities and provide you with pure, refreshing water. Invest in this top-of-the-line filtration solution for reliable performance and superior water quality every day.

    £4.19

  • Sale -50% Aquafilter AISTRO-2 2" x 10" in-line water softening and iron removal cartridge Softening Cartridge Aquafilter

    Aquafilter Aquafilter AISTRO-2 2" x 10" in-line water softening and iron removal cartridge

    The AISTRO-2 is an In-line water softening cartridge with clear housing. Exchanges calcium and magnesium with sodium ions and therefore reduces water hardness. Available with 1/4″ NPT connection.    The AISTRO-2 utilizes FDA-grade sodium based strongly acidic ion-exchange resin which reduces calcium and magnesium ions content in water. Calcium and magnesium are often called “hardness minerals”. Large amount of these ions in water are responsible for a formation of the scale deposits, higher detergent consumption and stains on a glassware. In extreme situations large amount of calcium and magnesium can lead to glass etching. Hard water leaves an invisible film on a skin, which blocks pores. This in turns causes chapping, itching and dryness. Softened water contains almost no calcium & magnesium.  It enables people to use lesser quantities of soap, shampoo, and skin care products. Moreover detergent consumption is reduced. Available size: 2,5″ x 12″ Working temperature: 2°C – 45°C Longevity: 3 – 6 months (depending on feed water quality). Applications / Uses– pre RO systems – under sink – icemakers – water coolers – refrigerators – coffee makers – and other application Keep in mind when water is extremely hard, filter will be exhausted very quickly, therefore a conventional water softener should be used. Technical Specification Media: FDA approved ion exchange resin Connections: 1/4″ NPT Filter Life: 3 – 6 months Dimensions: 2,5″ x 12″ (74 mm x 288 mm) Flow Rate: 2.8 l/min (0.75 gpm) Operating Pressure: 6 bar (90 psi) Minimum Temperature: 2°C (35°F) Maximum Temperature: 40°C (104°F) Body & Cap: PET Excellent choice for lime scale removal and lime scale problems Made in the EU with High Quality materials

    £5.03 £2.51

  • Sale -25% Aquafilter AISTRO 2" x 10" in-line water softening cartridge - 1/4" NPT Softening Cartridge Aquafilter

    Aquafilter Aquafilter AISTRO 2" x 10" in-line water softening cartridge - 1/4" NPT

    ACR-1 series utilizes FDA-grade, sodium, based, strongly acidic ion-exchange resin which reduces calcium and magnesium ion content in water. Calcium and magnesium are often called "hardness minerals". Large amounts of these ions in water are responsible for the formation of scale deposits, higher detergent consumption and stains on glassware. In extreme cases large amounts of calcium and magnesium can lead to glass etching. Hard water damages home appliances such as: dishwashers and washing machines, and increases their energy consumption. Aquafilter offers AISTRO In-line Softener cartridge (AISTRO, AISTRO-L-AQ and AISTRO-QC) suitable for POU (Point of Use) installations. Through its double media consisted of ion exchange-based resins, AISTRO cartridges effectively reduce water hardness (high concentration of calcium and magnesium ions). In case your feed water contains a high concentration of suspended matter, AISTRO is commonly preceded by a Sediment filter to avoid a detriment of the cartridge performance. AISTRO fits most 1/4” water lines and requires no additional tools for its installation.

    £3.35 £2.51

  • Set of 3 replaceable in-line cartridges for EXCITO-ST system. Filter Set Aquafilter

    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.

    £12.30

  • 2x Aquafilter In - Line External 5 Micron Sediment Removal Water Filter AIPRO - GroAqua

    Aquafilter 2pk Aquafilter In-Line External 5 Micron Sediment Removal Water Filter AIPRO

    Enhance Your Water Quality Upgrade your water filtration system with the 2x Aquafilter In-Line External 5 Micron Sediment Removal Water Filter AIPRO. These inline water filters are designed to effectively reduce sediment, dirt, rust, and other particles from your drinking water, providing you with clean and pure water for drinking and cooking. Say goodbye to impurities and enjoy fresh-tasting water straight from your tap. Efficient Sediment Reduction With a 5-micron rating, these inline water filters offer superior sediment reduction, ensuring that your water is free from any unwanted contaminants. The advanced filtration technology used in these filters helps prolong the life of your appliances by preventing sediment buildup, saving you time and money on costly repairs. Make the smart choice for your home by investing in these durable and reliable water filters. Compatible with Refrigerators Not only are these filters perfect for improving the quality of your tap water, but they are also compatible with fridge filters, making them a versatile addition to any home. Simply install the Aquafilter In-Line External Water Filters in your refrigerator's water line for crystal-clear ice and refreshing drinks. Experience the convenience and peace of mind that comes with having clean and safe drinking water at your fingertips.

    £7.55

  • Aquafilter FCCST-L 20" Water softening cartridge Softening Cartridge Aquafilter

    Aquafilter Aquafilter FCCST-L 20" Water softening cartridge

    Aquafilter FCCST 20" Water softening cartridge. FCCST-L utilizes FDA-grade, sodium, based, strongly acidic ion-exchange resin which reduces calcium and magnesium ion content in water. Calcium and magnesium are often called "hardness minerals". Large amounts of these ions in water are responsible for the formation of scale deposits, higher detergent consumption and stains on glassware. In extreme cases large amounts of calcium and magnesium can lead to glass etching. Hard water damages home appliances such as: tea kettles, dishwashers and washing machines, and increases their energy consumption. Hard water leaves an invisible film on skin, which blocks pores. This in turns causes chapping, itching and dryness. Softened water contains almost no calcium & magnesium. It enables people to use lesser quantities of soap, shampoo, and skin care products. Moreover, detergent consumption is reduced. Aquafilter FCCST can be used in every POU application where soft water is required. Aquafilter FCCST series cartridges are an effective and efficient solution for POE and POU applications. Their undeniable benefit is ease of installation and changeout. Cartridges include pre- and post-filters, preventing media particles from being washed out. Cartridges are available in various capacities to meet Customer demands. FCCST was designed to allow optimal contact between water and resin therefore ensuring maximum performance (ion exchange).Specifications: Media: FDA approved ion exchange resin Filter Life: 3 - 6 months Operating Pressure: 6 bar Minimum Temperature: 2ºC Maximum Temperature: 40°C End caps: PP Gasket: Silicone Body: HDPE Post-filter: PP

    £12.05

  • Set of 4 replaceable in-line cartridges for EXCITO-ST system Filter Set Aquafilter

    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.

    £22.93

Inline water filters provide a compact and convenient way to treat water directly within a pipework system or at the point of use. Unlike conventional filter housings, many inline cartridges connect directly to the water line using standard threaded or quick-connect fittings. Their compact design makes them suitable for applications where space is limited or where a dedicated filter housing is not required.

At GroAqua, we stock a range of inline water filter cartridges from Aquafilter, covering several filtration and water treatment applications. Whether you need to improve the taste and odour of drinking water, add a final filtration stage to a reverse osmosis system or help manage scale in an appliance, choosing the correct inline cartridge is essential for effective performance.

Types of Inline Water Filter Cartridges

Different inline filters use different filtration media and technologies. Selecting the right type depends on the water quality, the application and the treatment required.

Inline Activated Carbon Filters

Activated carbon inline filters are commonly used to reduce chlorine, certain organic compounds and substances that can affect the taste and odour of water. Granular activated carbon (GAC) cartridges are frequently installed as a post-filter on reverse osmosis systems or used in compatible refrigerators and drinking water dispensers.

Aquafilter inline carbon cartridges are available in different sizes and connection types. Always check the cartridge dimensions, fittings and manufacturer's specifications before choosing a replacement.

Inline Ultrafiltration Cartridges

Ultrafiltration (UF) cartridges use a fine membrane to reduce suspended particles and other specified contaminants. Depending on the membrane specification, ultrafiltration can help reduce sediment, rust, bacteria and certain other microorganisms.

Unlike reverse osmosis, ultrafiltration does not normally remove dissolved minerals from water. This makes UF cartridges suitable for applications where particulate and microbiological filtration is required while retaining dissolved minerals. Check the individual product specifications for pore size, performance claims and compatible applications.

Inline Mineralising and Remineralising Filters

Mineralising cartridges are commonly installed after a reverse osmosis system. Reverse osmosis removes a broad range of dissolved substances, and a compatible remineralising cartridge can add selected minerals, such as calcium and magnesium, back into the treated water.

These cartridges are available in different formats and connection types. Check that the cartridge is suitable for your RO system and that its fittings match your existing water line.

Inline Water-Softening and Anti-Scale Filters

Inline water-softening and anti-scale cartridges are designed for specific applications where limescale or mineral deposits may affect equipment performance. Depending on the media used, these filters may reduce hardness minerals or help limit scale formation.

Some specialist cartridges are designed for appliances such as washing machines, while others are intended for particular water filtration systems. It is important to distinguish between filters that remove hardness minerals and anti-scale products that condition water without removing those minerals.

Inline Water Filters for Reverse Osmosis Systems

Inline cartridges are widely used as additional treatment stages in domestic reverse osmosis systems. Depending on the system design, they may be fitted before or after the RO membrane to provide additional filtration or water conditioning.

Common applications include:

  • Carbon post-filters: Help improve the taste and odour of RO water.
  • Mineralising cartridges: Add selected minerals such as calcium and magnesium after RO filtration.
  • Ultrafiltration cartridges: Provide an additional membrane filtration stage in compatible systems.
  • Replacement cartridge sets: Restore the filtration stages of compatible multi-stage systems.

If you are replacing a cartridge, check the original model number, dimensions, connection type and recommended flow direction before ordering.

Inline Filters for Refrigerators and Appliances

Compact inline water filters can also be used with compatible refrigerators, ice makers, water dispensers and other appliances. Activated carbon cartridges are commonly selected for reducing chlorine and improving the taste and odour of water supplied to these appliances.

Specialist anti-scale cartridges are also available for selected applications, including washing machines. Always confirm that the filter is designed for the appliance and water connection in question. Not every inline cartridge is suitable for every appliance or installation.

Choosing the Right Inline Water Filter

Before purchasing an inline water filter cartridge, consider the following:

  1. Filtration purpose: Decide whether you need sediment reduction, activated carbon filtration, ultrafiltration, remineralisation or scale treatment.
  2. Connection type: Check whether your system uses threaded connections, such as 1/4-inch NPT, or quick-connect fittings.
  3. Cartridge dimensions: Confirm the length and diameter of the replacement cartridge.
  4. System compatibility: Check the manufacturer's model number and compatibility information, particularly for proprietary filter systems.
  5. Operating conditions: Check the maximum operating pressure, water temperature and recommended flow rate.
  6. Replacement interval: Follow the manufacturer's guidance for cartridge replacement and service life.

Choosing a compatible filter helps maintain the performance of your water treatment system and reduces the risk of leaks or poor filtration.

Shop Inline Water Filters at GroAqua

Explore our range of inline water filter cartridges, including Aquafilter activated carbon filters, ultrafiltration membranes, mineralising cartridges and specialist water-softening filters. Whether you are maintaining an existing reverse osmosis system, replacing a refrigerator filter or selecting an additional filtration stage, GroAqua offers a range of compact inline filtration options.

Browse our collection and check each product's specifications to find the right inline water filter for your system.

© 2026 GroAqua, Powered by Shopify

    • American Express
    • Apple Pay
    • Bancontact
    • Bizum
    • Diners Club
    • Discover
    • Google Pay
    • iDEAL Wero
    • Klarna
    • Maestro
    • Mastercard
    • MB WAY
    • PayPal
    • Satispay
    • Shop Pay
    • Union Pay
    • Visa