Air Pumps for Ponds, Septic Tanks & Wastewater Systems

The Charles Austen Enviro ET30 is a compact, energy-efficient linear diaphragm air pump designed to provide a dependable supply of oil-free air for pond aeration, wastewater treatment and other low-pressure air applications. Delivering up to 30 litres of air per minute at 0.12 bar, the ET30 combines reliable airflow with a low electrical power consumption of just 25 W. Its robust, weather-resistant construction makes it suitable for indoor and outdoor installations where consistent aeration is required. The ET30 is part of the Charles Austen enviro ET air pump range, developed for applications that benefit from continuous air delivery, including pond aeration and wastewater treatment systems. Key Features and Benefits 30 L/min airflow: Provides a steady supply of air for aeration applications. Low-pressure performance: Rated airflow of 30 L/min at 0.12 bar. Energy efficient: Uses only 25 W of electrical power. Oil-free air delivery: Suitable for applications requiring a clean air supply without oil lubrication. Linear diaphragm technology: Designed for reliable, consistent air delivery. Weather-resistant construction: Suitable for appropriate indoor and outdoor installations. Compact design: Measures approximately 208 × 150 × 178 mm. Low-noise operation: Manufacturer literature lists noise levels as low as 35 dB(A). Serviceable design: Replacement service kits are available to support ongoing maintenance. Continuous-duty suitability: Designed for applications requiring sustained aeration. Reliable Air Supply for Pond Aeration The Enviro ET30 is suitable for pond aeration systems where a consistent air supply is needed to support water movement and oxygen transfer. Connected to suitable air diffusers or air stones, the pump distributes air into the water, creating bubbles and circulation. This helps increase contact between water and air and supports dissolved oxygen levels. Pond aeration can be particularly valuable in: Koi ponds. Garden ponds. Fish-holding systems. Aquaculture installations. Pond filtration systems. The appropriate pump size depends on pond volume, water depth, diffuser resistance and the number of air outlets. The ET30 should be selected according to the required airflow at the operating pressure, rather than airflow alone. Suitable for Wastewater and Septic Tank Aeration The Enviro ET series is also designed for wastewater aeration applications. Supplying air to an appropriately designed treatment system helps maintain oxygen availability for aerobic microorganisms involved in biological wastewater treatment. The ET30 can be considered for suitable: Domestic wastewater treatment systems. Septic treatment installations designed for aeration. Small wastewater aeration applications. Biological treatment systems requiring a low-pressure air supply. Always check the airflow and pressure requirements of the treatment system before selecting the pump. Efficient 25 W Operation The ET30 delivers its rated airflow while consuming only 25 W of electrical power. This makes it an attractive option for installations where the pump needs to operate for extended periods. Its principal performance specification is: 30 litres per minute at 0.12 bar Actual airflow changes with operating pressure and the resistance of the connected air distribution system. Long air lines, small-diameter pipework, deep water and restrictive diffusers can all affect delivered airflow. Weather-Resistant and Compact Construction The Enviro ET30 has a robust, compact housing designed for use in suitable indoor and outdoor environments. Its dimensions are approximately: 208 × 150 × 178 mm (L × W × H) The compact design makes it easier to position close to a pond filtration system, wastewater treatment installation or other aeration equipment. For outdoor installations, position the pump in a location that protects its electrical connection and prevents water ingress, flooding or excessive exposure to standing water. Follow the manufacturer's installation instructions. Maintenance and Service Kits The Enviro ET30 is designed to be serviceable, with replacement service kits available. Charles Austen recommends servicing its enviro pumps at least every 18 months. Regular maintenance helps maintain reliable operation and allows wear components to be replaced before they cause a loss of performance. The ET30 service kit includes components such as diaphragms and filters. Maintenance should be carried out according to the manufacturer's service instructions, with the electrical supply disconnected before opening the pump. Technical Specifications Specification Value Manufacturer Charles Austen Product range enviro ET Series Model ET30 Pump type Linear diaphragm air pump Maximum rated airflow 30 L/min Rated airflow pressure 0.12 bar Power consumption 25 W Outlet connection 14 mm (confirm fitting supplied) Dimensions (L × W × H) 208 × 150 × 178 mm Weight Approximately 4 kg Construction Robust, weather-resistant housing Air delivery Oil-free Recommended service interval At least every 18 months Applications Pond aeration and wastewater aeration What's Included? The manufacturer's ET-series documentation identifies a rubber elbow connector as a supplied fitting. Please check the exact package configuration with the supplier before specifying additional brass fittings, hose clips or airline accessories as included. Is the Charles Austen Enviro ET30 Right for You? Choose the Enviro ET30 if you need a compact, energy-efficient air pump delivering up to 30 L/min for pond aeration or a suitable wastewater treatment application. It is particularly suitable for: Small and medium pond aeration arrangements where 30 L/min is sufficient. Koi pond filtration systems with appropriately sized diffusers. Wastewater treatment systems requiring a continuous low-pressure air supply. Installations where low electrical consumption is important. Users looking for a serviceable alternative to inexpensive disposable air pumps. Before purchasing, check the required airflow, working pressure, pipe diameter and diffuser resistance of your installation. Choose the Charles Austen Enviro ET30 for dependable, energy-efficient aeration with 30 L/min rated airflow.

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The Charles Austen Enviro ET40 is a powerful, oil-free linear diaphragm air pump designed to provide a dependable supply of air for pond aeration, aquaculture, hydroponic growing systems and other low-pressure applications. Delivering a rated airflow of 40 litres per minute at 0.12 bar, the ET40 is well suited to installations requiring more air capacity than a smaller pond or aquarium air pump can provide. It can supply multiple air stones or diffusers through a suitable distribution manifold, making it a practical choice for larger water systems and multi-outlet setups. Using Charles Austen's energy-efficient Green Drive technology, the ET40 combines high airflow with a relatively low power consumption of just 30W. Its compact, weather-resistant construction makes it suitable for a range of indoor and outdoor installations when correctly positioned and protected. Key features 40 L/min airflow: Rated air delivery of 40 litres per minute at 0.12 bar. Energy efficient: 30W power consumption. Oil-free air supply: Linear diaphragm pump technology provides clean air without oil lubrication. Weather-resistant construction: Robust, compact housing for suitable indoor and outdoor installations. Continuous or intermittent operation: Designed for applications requiring regular or continuous aeration. Multiple diffuser applications: Can supply several air stones or diffusers when connected to an appropriately sized manifold. Serviceable design: Replacement service kits are available to support routine maintenance. Rubber elbow supplied: Manufacturer information identifies a rubber elbow as part of the ET-series fitting arrangement. Suitable applications The Enviro ET40 can be used in a variety of aeration applications, including: Ponds and koi pondsProvides an air supply for pond diffusers, helping to circulate and aerate pond water. The actual aeration performance will depend on pond depth, diffuser selection and system back pressure. Hydroponics and deep water culture (DWC)Suitable for supplying air stones and air domes in hydroponic systems. Its 40 L/min output makes it useful where several growing containers or aeration points need to be supplied from one pump. Aquaculture and fish systemsCan provide air to multiple aeration points in suitable fish-rearing and aquaculture installations. Select the diffuser arrangement and airflow distribution to suit the system's oxygen requirements. Wastewater aerationThe ET series is also used in wastewater applications where a reliable, low-pressure air supply is required. Technical specifications Specification ET40 Pump type Linear diaphragm air pump Rated airflow 40 L/min Rated pressure point 0.12 bar Power consumption 30W Outlet connection 14mm – confirm against supplied unit Dimensions 218 × 156 × 182mm Air supply Oil-free Construction Compact, weather-resistant housing Operation Intermittent or continuous applications Installation and maintenance Install the pump on a stable, suitable surface in accordance with the manufacturer's instructions. Use compatible airline, fittings and diffusers, and ensure that the total system resistance does not exceed the pump's operating capability. For multiple outlets, a suitable air distribution manifold can help divide the airflow between individual diffusers. The airflow available at each outlet will depend on the number of outlets, airline dimensions, diffuser resistance and operating pressure. Charles Austen recommends servicing Enviro pumps at least every 18 months. Replacement service kits are available and routine maintenance helps keep the pump operating correctly. Why choose the Charles Austen Enviro ET40? The ET40 is a practical choice when a smaller air pump does not provide enough airflow for a larger pond, hydroponic system or multi-diffuser installation. Its 40 L/min rated output, 30W power consumption and serviceable construction make it a useful option for users who need dependable, higher-volume aeration. Choose the Charles Austen Enviro ET40 for a compact, oil-free air pump delivering 40 litres per minute for pond, aquaculture and hydroponic applications.

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Charles Austen Enviro ET80 Air Pump – 80 L/min The Charles Austen Enviro ET80 is a high-output, oil-free linear diaphragm air pump designed for larger pond aeration systems, koi ponds, hydroponics, aquaculture and other applications requiring a substantial and dependable supply of air. With a rated airflow of 80 litres per minute, the ET80 is designed for installations where smaller air pumps may not provide sufficient capacity. It can supply multiple air stones or diffusers through a suitable distribution manifold, making it a practical choice for larger ponds, multi-tank hydroponic systems and commercial aeration applications. The ET80 combines Charles Austen's Green Drive technology with a robust, compact and weather-resistant construction. Its 85W power consumption makes it suitable for users looking for a high-volume air supply from a serviceable pump designed for regular operation. Key features 80 L/min rated airflow: High-volume air delivery for larger aeration installations. 85W power consumption: Designed to deliver substantial airflow for its power rating. Oil-free air supply: Linear diaphragm pump technology operates without oil lubrication. 18mm outlet connection: Suitable for compatible airline fittings and distribution systems. Weather-resistant construction: Robust housing for suitable indoor and outdoor installations. Multiple diffuser applications: Can supply several air stones or diffusers when connected to an appropriately sized manifold. Green Drive technology: Designed to provide an energy-efficient air supply. Serviceable design: Replacement service kits are available to support routine maintenance. Rubber elbow supplied: The manufacturer identifies a rubber elbow as part of the ET-series fitting arrangement. Suitable applications Large pond and koi pond aeration The Enviro ET80 provides a high-volume air supply for larger ponds and koi installations. It can be connected to compatible pond diffusers to introduce air into the water and support circulation and oxygen transfer. Its output makes it particularly useful where several aeration points are required. The number and type of diffusers should be selected according to pond depth, water volume, diffuser resistance and the required aeration performance. Hydroponics and deep water culture The ET80 is suitable for larger hydroponic installations that require a substantial supply of air to nutrient solutions. It can supply multiple air stones, air domes or compatible diffusers through a suitable manifold. This makes it a useful option for growers operating several deep water culture containers or larger growing systems. Aquaculture and fish-rearing systems For suitable aquaculture installations, the ET80 can provide air to multiple aeration points. Correct diffuser selection and airflow distribution are important to ensure that the system receives the required aeration. Wastewater aeration The Charles Austen Enviro ET range is also used in wastewater applications where a reliable low-pressure air supply is required. Aeration can support aerobic biological processes by supplying air to the treatment system. Technical specifications Specification ET80 Manufacturer Charles Austen Product range Enviro ET Series Model ET80 Pump type Linear diaphragm air pump Air supply Oil-free Rated airflow 80 L/min Rated pressure Confirm before publication: 0.10 or 0.12 bar Power consumption 85W Outlet connection 18mm Dimensions (L × W × H) 210 × 185 × 171mm Weight Approx. 7kg Supply voltage 220–240V AC, 50Hz Construction Compact, weather-resistant housing Installation and maintenance Install the pump on a stable surface in a suitable location, following the manufacturer's installation instructions. Although the ET80 has weather-resistant construction, it should be positioned and protected appropriately for its operating environment. Use compatible airline, fittings and diffusers. For installations with several aeration points, an air distribution manifold can divide the output between individual outlets. Actual airflow at each diffuser depends on operating pressure, water depth, airline dimensions, diffuser resistance and the number of connected outlets. The rated 80 L/min figure should therefore be considered alongside the pump's specified operating pressure. Charles Austen recommends servicing Enviro pumps at least every 18 months. Replacement service kits are available to support routine maintenance and help maintain correct operation. Why choose the Charles Austen Enviro ET80? The ET80 is a strong option for pond owners, hydroponic growers and water-system operators who need more airflow than smaller aeration pumps can provide. With its 80 L/min rated output, 85W power consumption, 18mm outlet and serviceable construction, it is particularly suited to larger aeration systems and installations supplying multiple diffusers. Choose the Charles Austen Enviro ET80 for high-volume aeration in larger ponds, koi systems, hydroponics and other suitable low-pressure air applications.

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The Charles Austen Enviro ET100 is a high-capacity, oil-free linear diaphragm air pump designed for large pond aeration systems, koi ponds, hydroponics, aquaculture and other applications requiring a substantial supply of air. Delivering a rated airflow of 100 litres per minute at 0.10 bar, the ET100 is designed for installations where smaller air pumps cannot provide sufficient airflow. Its high output makes it suitable for supplying multiple air stones or diffusers through a correctly sized distribution manifold. The ET100 combines Charles Austen's Green Drive technology with a robust, compact and weather-resistant construction. With a power consumption of 105W, it provides a high-volume air supply for larger aeration installations and applications requiring regular or continuous operation. Key features 100 L/min rated airflow: High-volume air delivery for larger aeration systems. 105W power consumption: Designed to provide substantial airflow for its output class. 0.10 bar rated pressure point: Published airflow specification for the ET100 model. Oil-free air supply: Linear diaphragm pump technology operates without oil lubrication. 18mm outlet connection: Compatible with suitable airline fittings and distribution systems. Weather-resistant construction: Robust housing for appropriate indoor and outdoor installations. Multiple diffuser applications: Can supply several air stones or diffusers through a suitable manifold. Green Drive technology: Designed to provide an efficient air supply. Serviceable design: Replacement service kits are available to support routine maintenance. Continuous or intermittent operation: Suitable for applications requiring regular or continuous aeration. Suitable applications Large pond and koi pond aeration The Enviro ET100 provides a substantial air supply for larger garden ponds and koi installations. It can be connected to compatible pond diffusers to introduce air into the water and support oxygen transfer and circulation. Its 100 L/min output makes it particularly useful where several aeration points are required. Select the number and type of diffusers according to pond depth, water volume, diffuser resistance and the aeration requirements of the system. Hydroponics and deep water culture The ET100 is suitable for larger hydroponic installations requiring a high-volume supply of air to nutrient solutions. It can supply multiple air stones, air domes or compatible diffusers through a suitable distribution manifold. This makes it useful for larger deep water culture systems and installations operating several growing containers. Aquaculture and fish-rearing systems For suitable aquaculture installations, the ET100 can provide air to multiple aeration points. Correct diffuser selection and airflow distribution are important to ensure that the system receives the required aeration. Wastewater aeration The Charles Austen Enviro ET range is also used in wastewater applications where a reliable, low-pressure air supply is required. Aeration can support aerobic biological processes by supplying air to the treatment system. Technical specifications Specification ET100 Manufacturer Charles Austen Product range Enviro ET Series Model ET100 Pump type Linear diaphragm air pump Air supply Oil-free Rated airflow 100 L/min Rated pressure point 0.10 bar Power consumption 105W Outlet connection 18mm Supply voltage 220–240V AC Supply frequency 50Hz Dimensions (L × W × H) 238 × 196 × 177mm Weight Approx. 8.5kg Construction Compact, weather-resistant housing Installation and maintenance Install the pump on a stable surface in a suitable location, following the manufacturer's instructions. Although the ET100 has weather-resistant construction, it should be positioned and protected appropriately for its operating environment. Use compatible airline, fittings and diffusers. For installations with several aeration points, an air distribution manifold can divide the output between individual outlets. Actual airflow at each diffuser depends on operating pressure, water depth, airline dimensions, diffuser resistance and the number of connected outlets. The rated 100 L/min figure should therefore be considered alongside the specified operating pressure, rather than treated as a guaranteed flow at every diffuser. Charles Austen Enviro pumps are designed to be serviced, with replacement service kits available. Regular maintenance is important for pumps used in continuous-duty applications. GroAqua recommends servicing its ET pumps approximately every 18 months. Why choose the Charles Austen Enviro ET100? The ET100 is a strong option for pond owners, hydroponic growers and water-system operators who need more airflow than smaller aeration pumps can provide. With its 100 L/min rated output, 105W power consumption, 18mm outlet and serviceable construction, it is particularly suited to larger installations and systems supplying multiple diffusers. Choose the Charles Austen Enviro ET100 for high-volume aeration in large ponds, koi systems, hydroponics, aquaculture and other suitable low-pressure air applications.

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The Charles Austen Enviro ET120 is a high-capacity, oil-free air pump designed for large pond aeration systems, koi ponds, hydroponics, aquaculture and other applications requiring a substantial and dependable supply of air. Delivering a rated airflow of 120 litres per minute at 0.12 bar, the ET120 is designed for installations where smaller air pumps cannot provide sufficient capacity. Its high-volume output makes it suitable for supplying multiple air stones or diffusers through a correctly sized air distribution manifold. The ET120 combines Charles Austen's Green Drive technology with a robust, compact and weather-resistant construction. It is designed for applications requiring regular or continuous aeration and offers a serviceable alternative to smaller, lower-output air pumps. Key features 120 L/min rated airflow: High-volume air delivery for larger aeration installations. 125W power consumption: GroAqua's listed power rating; confirm against the supplied model revision. 0.12 bar rated pressure point: Current Charles Austen ET-series airflow specification. Oil-free air supply: Designed to provide air without oil lubrication. 18mm outlet connection: Suitable for compatible airline fittings and distribution systems. Weather-resistant construction: Robust housing for appropriate indoor and outdoor installations. Multiple diffuser applications: Can supply several air stones or diffusers through a suitable manifold. Green Drive technology: Designed to provide an energy-efficient air supply. Serviceable design: Replacement service kits are available to support routine maintenance. Regular or continuous operation: Suitable for applications requiring ongoing aeration. Suitable applications Large pond and koi pond aeration The Enviro ET120 provides a substantial air supply for large ponds and koi installations. Connect it to compatible pond diffusers to introduce air into the water and support oxygen transfer and circulation. Its 120 L/min output makes it suitable for systems requiring several aeration points. Select the number and type of diffusers according to pond depth, water volume, diffuser resistance and the required aeration performance. Hydroponics and deep water culture The ET120 is suitable for larger hydroponic installations requiring a high-volume supply of air to nutrient solutions. It can supply multiple air stones, air domes or compatible diffusers through an appropriately sized distribution manifold. This makes it a useful option for commercial growing systems and installations operating multiple deep-water culture containers. Aquaculture and fish-rearing systems For suitable aquaculture installations, the ET120 can provide air to multiple aeration points. Correct diffuser selection and airflow distribution are important to ensure the system receives the required aeration. Wastewater aeration The Charles Austen Enviro range is designed for applications including wastewater aeration. Supplying air to a suitable treatment system can support aerobic biological processes by increasing oxygen availability. Technical specifications Specification ET120 Manufacturer Charles Austen Product range Enviro ET Series Model ET120 Pump type Oil-free air pump Rated airflow 120 L/min Rated pressure point 0.12 bar – confirm model revision Power consumption 125W – verify against supplied unit Outlet connection 18mm Supply voltage 220–240V AC Supply frequency 50Hz Dimensions (L × W × H) 265 × 215 × 198mm Weight Approx. 9.5kg Construction Compact, weather-resistant housing Installation and maintenance Install the pump on a stable surface in a suitable location, following the manufacturer's instructions. Although the ET120 has weather-resistant construction, it should be positioned and protected appropriately for its operating environment. Use compatible airline, fittings and diffusers. For installations with several aeration points, an air distribution manifold can divide the output between individual outlets. Actual airflow at each diffuser depends on operating pressure, water depth, airline dimensions, diffuser resistance and the number of connected outlets. The rated 120 L/min figure should therefore be considered alongside the specified operating pressure, rather than treated as a guaranteed flow at every diffuser. Charles Austen recommends servicing Enviro pumps at least every 18 months. Replacement service kits are available to support routine maintenance. This is particularly important for pumps used regularly or continuously. Why choose the Charles Austen Enviro ET120? The ET120 is a strong option for pond owners, hydroponic growers and water-system operators who need a high-volume air supply for larger installations. With its 120 L/min rated airflow, 18mm outlet and serviceable construction, it is particularly suited to larger aeration systems and installations supplying multiple diffusers. Choose the Charles Austen Enviro ET120 for high-volume aeration in large ponds, koi systems, hydroponics, aquaculture and other suitable low-pressure air applications.

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The Charles Austen Enviro ET300 is a high-capacity, oil-free air blower designed to provide powerful, reliable airflow for large-scale aeration systems. Delivering up to 300 litres per minute at 0.20 bar, it is suited to demanding applications where a substantial and consistent supply of air is required. Part of the Enviro ET Double Series, the ET300 is designed for applications including wastewater treatment, sewage treatment plants, large pond aeration systems and other installations requiring high-volume airflow. Its compact, weatherproof construction provides a practical alternative to larger or noisier rotary vane compressors. High-capacity airflow for demanding applications With a rated airflow of 300 L/min at 0.20 bar, the ET300 can supply air to suitably designed diffuser and manifold systems. It is particularly useful in larger installations where the airflow demand may otherwise require multiple smaller pumps. The actual airflow delivered will depend on operating pressure, pipework, diffuser resistance and the configuration of the aeration system. For best results, ensure that the blower is correctly matched to the total system requirements. Oil-free air supply The ET300 uses a diaphragm-based pumping design to provide an oil-free air supply. This makes it suitable for applications where an oil-free source of air is preferred, including pond and wastewater aeration. Robust construction and serviceability Designed for demanding operating environments, the Enviro ET300 features a robust, weatherproof enclosure suitable for appropriate indoor or outdoor installations. The pump is serviceable, with replacement service kits available to help maintain performance and extend its working life. Charles Austen recommends servicing Enviro pumps at least every 18 months. Typical applications Large sewage treatment and wastewater aeration systems. Commercial pond aeration. Large fish ponds and aquatic installations. Aquaculture and fish-holding systems. Hydroponic systems requiring high-volume air supply. Replacement of suitable rotary vane compressors. Technical specifications Specification Details Manufacturer Charles Austen Product series Enviro ET Double Series Model ET300 Maximum rated airflow 300 L/min Rated pressure 0.20 bar Power consumption 275W Outlet connector 26mm Dimensions (L × W × H) 348.5 × 230.5 × 219mm Weight Approximately 18kg Noise level 40 dB(A), manufacturer specification Pump type Oil-free diaphragm air blower Installation and maintenance The ET300 has a 26mm outlet connection. Ensure that the connecting pipework, manifold and diffusers are appropriately sized for the required airflow and operating pressure. For continued performance, follow the manufacturer's installation and maintenance guidance. Charles Austen recommends servicing Enviro pumps at least every 18 months, with service kits available for routine maintenance. Choose the Charles Austen Enviro ET300 when your installation needs high-volume, oil-free airflow from a robust, serviceable air blower.

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The ET series range of air pumps ensures that there is plenty of water movement in wastewater applications; this boosts oxygen levels in the water, allowing aerobic bacteria to decompose. When used in medical applications, the ET series provides a high flow at low pressure. Robust and compact construction - weatherproof Green drive technology offers energy efficient motors meaning low power consumption Supplied with a rubber elbow for easy fitting  Model Flow Connector Power Dimensions ET40A 40lpm @ 0.12bar 18mm 30w 220 x 155 x 140mm ET60A 60lpm @ 0.12bar 18mm 55w 253 x 165 x 183mm ET80A 80lpm @ 0.12bar 18mm 85w 210 x 185 x 201mm ET100A 100lpm @ 0.12bar 18mm 105w 238 x 196 x 207mm ET120A 120lpm @ 0.12bar 18mm 125w 315 x 215x 228mm ET150A 150lpm @ 0.12bar 18mm 125w 346 x 200 x 222mm ET200A 200lpm @ 0.12bar 18mm 210w 346 x 200 x 222mm ET250A 250lpm @ 0.12bar 26mm 221w 348 x 231 x 219mm ET300 300lpm @ 0.12bar 26mm 221w 348 x 231 x 219mm Technical Data Sheet

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The Charles Austen Enviro ET150 Pro Air Pump is a high-output, oil-free air pump designed for reliable aeration in ponds, wastewater treatment systems and other applications requiring a substantial supply of air. Delivering a rated airflow of 150 litres per minute at 0.20 bar, the ET150 Pro provides consistent airflow for suitably designed diffuser and distribution systems. Its robust, compact and weatherproof construction makes it suitable for a range of indoor and outdoor installations. Whether you are oxygenating a large pond, supplying air to a wastewater treatment system or maintaining circulation in an aquaculture installation, the ET150 offers a practical solution for demanding aeration requirements. High-output airflow for effective aeration With a rated output of 150 L/min at 0.20 bar, the ET150 is designed for systems that need more airflow than smaller pond and aquarium air pumps can provide. It can supply air to appropriately sized diffusers and distribution manifolds, helping to circulate water and support oxygen transfer throughout an aeration system. Actual airflow at the diffuser will depend on operating pressure, water depth, pipework, diffuser resistance and the overall installation design. Oil-free air pump technology The ET150 uses an oil-free diaphragm pumping design to provide an air supply without an oil-lubricated compression chamber. This makes it suitable for pond aeration, wastewater treatment and other applications where an oil-free air supply is preferred. Robust, weatherproof construction The Charles Austen Enviro range is designed with robust, compact construction and a weatherproof enclosure for appropriate indoor and outdoor installations. Its energy-efficient motor technology is designed to provide substantial airflow while keeping power consumption in consideration for continuous aeration applications. Suitable applications The ET150 Pro can be used in a variety of aeration installations, including: Large garden and koi ponds. Pond filtration and biological filter aeration. Wastewater treatment systems. Domestic sewage treatment plants. Septic tank aeration systems. Aquaculture and fish-holding facilities. Hydroponic systems requiring high-volume airflow. Easy to maintain The ET150 is designed to be serviceable, with compatible replacement service kits available. Charles Austen recommends servicing Enviro pumps at least every 18 months. For the Pro Series motor warranty, the manufacturer specifies annual servicing to validate the two-year motor warranty. Check the warranty conditions and service requirements before installation. Technical specifications Specification Details Manufacturer Charles Austen Product range Enviro Model ET150 Pro Rated airflow 150 L/min Rated pressure 0.20 bar Outlet connector 18mm Dimensions (L × W × H) 256 × 200 × 222mm Pump type Oil-free diaphragm air pump Construction Robust, weatherproof enclosure Maintenance Manufacturer recommends servicing every 18 months Power consumption: Confirm the exact ET150 Pro production version before publishing a wattage figure, as published ET150 specifications vary. Installation guidance The ET150 has an 18mm outlet connection. Ensure that the airline, manifolds, connectors and diffusers are correctly sized for the required airflow. For installations with multiple diffusers, use a suitably sized air distribution manifold and ensure that the combined system resistance does not exceed the pump's operating capabilities. Regular servicing and the use of compatible replacement parts will help maintain reliable operation. Choose the Charles Austen Enviro ET150 Pro when you need a robust, oil-free air pump delivering 150 litres per minute for pond aeration, wastewater treatment or other high-output aeration applications.

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The service kit for the ET 100 includes 2 diaphragms, 1 filter and 1 magnet. At GroAqua we recommend your ET pump be service every 18 months.

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The service kit for the ET 120 includes 2 diaphragms, 1 filter and 1 magnet. At GroAqua we recommend your ET pump be service every 18 months.

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The service kit for the ET 40 includes 2 diaphragms, 1 filter and 1 magnet. At GroAqua we recommend your ET pump be service every 18 months.

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The service kit for the ET 30 includes 2 diaphragms, 1 filter and 1 magnet. At GroAqua we recommend your ET pump be service every 18 months.

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The service kit for the ET 60 includes 2 diaphragms, 1 filter and 1 magnet. At GroAqua we recommend your ET pump be service every 18 months.

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The service kit for the ET 80 includes 2 diaphragms, 1 filter and 1 magnet. At GroAqua we recommend your ET pump be service every 18 months.

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The service kit for the ET150 / ET200 includes 2 diaphragms, 1 filter and 8 valves. At GroAqua we recommend your ET pump be serviced every 18 months.

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Smart.  Ultra efficient, Ultra quier Air Pump Charles Austen ETi150 Pro Air Pump is a reliable solution for keeping your pond healthy and thriving. This powerful pump is designed to oxygenate water efficiently, promoting the well-being of your aquatic plants and fish. With its durable construction and long-lasting performance, this air pump is a must-have for any pond owner looking to maintain a pristine ecosystem. Efficient Septic Tank Aerator Not just for ponds, the Charles Austen ETi150 Pro Air Pump is also ideal for use in septic tanks. By providing a steady flow of oxygen, this air pump helps break down waste and prevent clogs, ensuring that your septic system functions smoothly and efficiently. Say goodbye to costly repairs and unpleasant odors with this reliable and efficient aerator. Easy to Install and Maintain Installing and maintaining the Charles Austen ETi150 Pro Air Pump is a breeze. Its compact design and simple instructions make setup a quick and easy process, while its low-maintenance operation ensures hassle-free use for years to come. Keep your pond or septic tank in top condition with this versatile and user-friendly air pump.

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Smart.  Ultra efficient, Ultra quier Air Pump Charles Austen ETi200 Pro Air Pump is a reliable solution for keeping your pond healthy and thriving. This powerful pump is designed to oxygenate water efficiently, promoting the well-being of your aquatic plants and fish. With its durable construction and long-lasting performance, this air pump is a must-have for any pond owner looking to maintain a pristine ecosystem. Efficient Septic Tank Aerator Not just for ponds, the Charles Austen ETi200 Pro Air Pump is also ideal for use in septic tanks. By providing a steady flow of oxygen, this air pump helps break down waste and prevent clogs, ensuring that your septic system functions smoothly and efficiently. Say goodbye to costly repairs and unpleasant odors with this reliable and efficient aerator. Easy to Install and Maintain Installing and maintaining the Charles Austen ETi200 Pro Air Pump is a breeze. Its compact design and simple instructions make setup a quick and easy process, while its low-maintenance operation ensures hassle-free use for years to come. Keep your pond or septic tank in top condition with this versatile and user-friendly air pump.

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