Accessories for the VISION AQUA water filters

VA-Standard-Cartridge System In water filtration it is very important to use a reliable and robust water filter cartridge system. Often, the pre- and post-filters are the Achilles' heel of a water treatment system, its weak point. The filter cartridges have to withstand pressure peaks of up to 50 bar that can occur in the water pipe. The cartridge must not burst or even jump out of the cartridge head. In addition, the filter cartridge must ensure a high flow rate in connection with the filter medium used.The VA-Standard - cartridges are sealed using a rotary welding process, which results in maximum strength. In addition, each cartridge has its own seals, which do not have to be laboriously cleaned, checked or replaced when changing the filter. With every new and fresh cartridge you also get new seals.The connection between the VA-Standard head and the VA-Standard cartridge is realized using a bayonet lock. If the cartridge is under pressure, the connection snaps into the bayonet lock. This makes it almost impossible to loosen or open the connection under pressure. Another feature is the mechanical blocking of the water supply on the VA-Standard head. If the VA-Standard cartridge is removed, two mechanical valves lock the water inlet and outlet in the VA-Standard head. This technology prevents water from leaking out of the VA-Standard head in an uncontrolled manner and causes damage to the water treatment system or the environment.The VA-Standard cartridge system is modern, robust and safe. It is also perfect as a kit to realize your own water filter variations. 

Activated carbon filtration: Activated carbon filters remove pollutants such as dust, heavy metals and some organic substances, as well as odours and tastes.During the service life of the activated granules, the pollutants accumulate in the filter. They must, therefore, be replaced at appropriate intervals.If no replacement takes place, the substances already absorbed may be released, which in turn causes additional water contamination.Features:Filters chlorine, odours and particlesWorking pressure from 1 bar - 4 barWorking temperature from 5°C - 40°C

The 1/4" check valve from John Guest is the reliable solution for water filter systems and reverse osmosis units. With its standard size, it fits perfectly into most common systems and effectively prevents water from flowing back. This ensures that the quality of your filtered water remains protected at all times and extends the lifespan of your system.Made from high-quality materials, this John Guest spare part stands out with its durability and ease of use. Installation is quick and requires no special tools, so you can easily fit the check valve yourself. Especially in water filtration technology, quality and precision matter – and this valve delivers both.Whether for home use or professional applications, the 1/4" check valve supports the reliable operation of your reverse osmosis system. It ensures that water flows only in the intended direction and provides lasting protection for your components.Key Benefits: Standard 1/4" size – perfect for water filter systems and reverse osmosis unitsReliable protection against water backflowPremium John Guest quality for long-lasting performanceEasy installation without special toolsIncreases safety and efficiency of your systemThe product range is not suitable for use in the compressed air and vacuum sector.

The 3/8" check valve from John Guest provides dependable protection against backflow in larger water filter systems and reverse osmosis units. It has been designed for applications that require higher flow rates, ensuring consistent performance and safety even in demanding environments.Thanks to proven John Guest craftsmanship, this check valve is robust and highly durable. Installation is simple and can be completed in just a few steps, adding a vital component to your filtration system for smooth operation.If you’re looking to upgrade your reverse osmosis system or water filtration unit with a reliable John Guest spare part, the 3/8" check valve is an excellent choice. It safeguards your system and ensures a steady supply of high-quality water at all times.Key Benefits:3/8" size for higher flow capacityEffective protection against water backflowRobust construction in trusted John Guest qualityQuick and easy installationExtends the lifespan of your reverse osmosis and filtration systemsThe product range is not suitable for use in the compressed air and vacuum sector.

Experience maximum flexibility and reliability when installing your water filter system. This faucet connection adapter with aerator and wastewater return connects your faucet to a 1/4″ tube system. It is an excellent spare part or upgrade for water filters, reverse osmosis systems and replacement components. The connection uses an M22 female thread (IG) ensuring a smooth link between your faucet and your filtration unit.With a well-thought-out design you benefit from convenient handling: The built-in aerator (perlator) provides a steady, splash-free water flow — perfect for use with a 1/4″ hose equipped RO system or direct water filter. The integrated return line for wastewater ensures excess water is neatly redirected, increasing the efficiency of your RO unit and simplifying discharge.The adapter perfectly complements your filtration setup and is finished in a chrome-look design with durable build. Whether at home, in a camper van or on the move — connecting your water filter or RO system becomes effortless. This adapter is compatible with the following VISION AQUA water filters:VA-Basic – travel water filter kit, reverse osmosis water filterVA-Basic PLUS – mobile water filterVanLife – water filter for campers and motorhomesBenefits for you at a glance:Direct M22 female thread to 1/4″ tube – perfect for water filters & RO systemsBuilt-in aerator ensures comfortable, splash-free flowWastewater return line included – clean dischargePremium workmanship – durable and functionalCompatible with VA-Basic, VA-Basic PLUS and VanLife by VISION AQUA

The John Guest T-Reducer Connector PM3022AE combines outstanding quality with easy handling. It connects two 22 mm tubes to a 15 mm tube – perfect for water filter systems, reverse osmosis units and other drinking water applications. The quick-connect design allows a tool-free installation that is clean, secure and reliable.Made from durable, food-grade plastic, this T-fitting ensures a tight seal and long-lasting performance, even under regular use. It’s ideal for home water systems, laboratories and commercial setups where consistent water flow and pressure are essential.Whether used as a replacement part or in new installations, the John Guest T-Reducer offers effortless and professional results. Simply push the tubes in – no need for screws, clamps or soldering. Reliable, fast and built for long-term performance.Your Benefits at a Glance:Perfect for water filters and reverse osmosis systemsTool-free quick-connect fittingCompatible with 22 mm and 15 mm tubingManufactured by John Guest, a trusted brand in fluid connection technologyIdeal as a replacement part or for extending existing systemsFood-grade and safe for potable waterFast installation and high leak resistanceThe connectors are also ideal for air, non-flammable gases (e.g. N2 and CO2) and vacuum applications.

The high-quality John Guest 3/8" OD Angle Shut-Off Valve provides a reliable and convenient solution for safe water connections in kitchens and households. Perfect for water filters, reverse osmosis systems, coffee machines, and drinking water dispensers, it allows precise control of water flow and enables individual appliances to be shut off without interrupting the main water supply.Thanks to the John Guest push-fit connection, installation is quick, secure, and tool-free. The built-in non-return valve prevents backflow into the water network in compliance with DIN 1988 / EN 1717. Its durable construction ensures a long service life, making it suitable for both domestic and commercial use.Ideal for maintenance work, filter changes, or appliance replacement – one simple movement shuts off the water flow safely. This angle valve combines safety, reliability, and ease of use – an essential spare part for every professional water filtration setup.Key benefits:Fits 3/8" OD tubingPerfect for water filters, reverse osmosis systems, and coffee machinesIndependent shut-off without interrupting main water flowBuilt-in check valve prevents backflowEasy tool-free installation with John Guest push-fit technologyDurable and high-quality constructionCompliant with DIN 1988 / EN 1717

Activated carbon filtration: Activated carbon filters remove pollutants such as dust, heavy metals and some organic substances, as well as odours and tastes.During the service life of the activated granules, the pollutants accumulate in the filter. They must, therefore, be replaced at appropriate intervals.If no replacement takes place, the substances already absorbed may be released, which in turn causes additional water contamination.Features:Activated carbon granules made from 100% coconut shell.10" inch cartridge

This magnetic valve is normally closed (NC = normally closed) when no power is applied and is used in reverse osmosis systems and other water filters. Features: Normally closed Material body: POM plastic Material membrane: NBR Working pressure: 0 to 7 bar Opening: 2,5 mm Fluid temperature: -10 ... +80 °C Connection: 1/4" tube external diameter John Guest Speedfit Voltage: 230 V 

The sediment filter is used to remove coarse suspended solids, often caused by mechanical contamination. These coarse particles strain all further filter stages. Sediment filters are therefore ideal pre-filters. Features:Filters all particles larger than 5 µm  Filters sand, mud, rust and dirt particles 

Activated carbon filtration: Activated carbon filters remove pollutants such as dust, heavy metals and some organic substances, as well as odours and tastes. During the service life of the activated granules, the pollutants accumulate in the filter. They must therefore be replaced at appropriate intervals.If no replacement takes place, the substances already absorbed may be released, which in turn causes additional water contamination.Features: Activated carbon block made of 100% coconut shell. Insert made of polypropylene fleece Made using the melt-blown process Enriched with nanosilver 10" inch cartridge 

The John Guest adapter with 3/4“ female BSPP thread to 3/8“ tube connection is the right choice when larger systems with higher flow rates need to be connected. It provides a secure and precise link between the angle valve and your water treatment equipment.The adapter is mounted directly on the 3/4“ cold water inlet under the sink and enables the connection of reverse osmosis systems, professional water filters, coffee machines or water dispensers. In our water filter systems, it is used together with the Hydro Stopper, ensuring a reliable and tight installation at the angle valve.Thanks to the precise John Guest engineering, this adapter ensures a stable and long-lasting fit. For anyone seeking a trustworthy spare part for drinking water systems, this adapter combines safety, durability and easy handling in one.Customer Benefits at a Glance:3/8” connection for systems with higher water flowUse in combination with the Hydro Stopper at the angle valveSuitable for reverse osmosis, water filters, coffee machines and water dispensersPremium John Guest quality and durabilityLong-lasting, leak-proof connection for drinking water applications

The John Guest Shut-Off Valve PPSV501222W offers outstanding build quality and effortless handling. It is the perfect choice for use in water filtration systems, reverse osmosis units, and other potable water applications. With its convenient 3/8" tube OD to 1/4" female NPTF connection, installation takes only seconds – no tools required.Made from high-grade, food-safe plastic, this valve ensures a secure seal even with frequent use. The ergonomic blue lever handle allows precise flow control, making maintenance and service of downstream components quick and safe.Important Note: The John Guest shut-off valves are designed exclusively for water applications. They must not be used with compressed air, explosive gases, petroleum, or other liquids, nor in heating systems or similar environments. Use only in the fully open or fully closed position.Key Benefits:Premium quality by John GuestQuick, tool-free installationPerfect for RO systems and water filtersDurable and food-grade materialsReliable isolation of downstream componentsEasy operation with ergonomic handleSafe use in water systems onlyThe shut-off valves must not be used as follows:as flow control (only partially open)as a permanent pipe end (here we recommend using our end caps.)only connected on one sideas a tap or faucet

The John Guest adapter with 3/4“ female BSPP thread to 1/4“ tube connection is the perfect accessory to connect water filters and reverse osmosis systems safely to your cold water supply. Since 1/4" is the standard size for most drinking water filters, this adapter is the ideal choice for under-sink installations.The adapter is mounted directly on the 3/4" cold water supply at the angle valve and ensures a leak-proof connection for water filters, reverse osmosis systems, coffee machines or water dispensers. In our water filter systems, it is specifically used together with the Hydro Stopper, which is installed at the angle valve. This makes the installation quick, secure and highly reliable.With the proven John Guest quality, you benefit from a robust and durable fitting that perfectly integrates into your existing setup. Handling is simple, the connection is leak-free, and it is ideally suited for drinking water applications. An essential spare part for anyone who values safe and clean water.Customer Benefits at a Glance:Standard size 1/4” – perfect for reverse osmosis systems and water filtersDesigned for use with the Hydro Stopper at the angle valveCompatible with coffee machines, water dispensers and water treatment systemsDurable and reliable John Guest qualityQuick and easy installation without toolsThe connectors are also ideal for air, non-flammable gases (e.g. N2 and CO2) and vacuum applications.

Simplifies the tightening and loosening of the John Guest connectors. Suitable for the following connector sizes: 3/16" 1/4" 5/16" (8mm) 3/8" 1/2" 

The John Guest Shut-Off Valve PPSV040808W – 1/4" Tube OD delivers a reliable and durable solution for controlling water flow in water filters, reverse osmosis systems, and other drinking water applications. Its precision push-fit connection ensures a secure, leak-free installation every time – no tools required.The compact design and smooth-turn lever make it easy to quickly isolate or reconnect the water supply, perfect for maintenance tasks such as filter changes or cleaning procedures.The JG shut-off valves are designed specifically for temporary maintenance of downstream components or assemblies. They must only be operated in the positions “fully open” or “fully closed.” This valve is suitable for potable water only. Not for use with compressed air, explosive gases, petroleum, heating systems, or similar applications.Customer Benefits:Quick and easy push-fit installationLeak-proof design without the need for toolsPerfect for reverse osmosis systems and water filtersDurable John Guest quality constructionSimple maintenance and operationDesigned for temporary maintenance useThe shut-off valves must not be used as follows:as flow control (only partially open)as a permanent pipe end (here we recommend using our end caps.)only connected on one sideas a tap or faucet

The inline mineralisation cartridge is mainly used after reverse osmosis filtration and contains NSF-approved media.The mineralisation cartridge enriches water with minerals such as calcium and magnesium.

Properties: suitable for polyethylene (LLDPE) tubes replaceable blade for tube diameters from Ø 4 - 12 mm Tube cutter is supplied without spare blades.

The John Guest shut-off valve PPSV041212W with a 3/8" tube connection offers outstanding quality and easy operation. Perfect for water filters, reverse osmosis systems and drinking water installations, this valve ensures reliable control of water flow. The ergonomic lever allows smooth handling and provides a secure seal when closed.Made from durable, food-grade plastic, this valve guarantees a long service life even with frequent use. The push-fit connections enable quick, tool-free installation, making it ideal for maintenance, replacement, or system upgrades. Professionals and DIY enthusiasts alike appreciate its dependability and ease of use.Important note: These shut-off valves are not suitable for compressed air, explosive gases, petroleum or other liquids, and must not be used in heating systems or similar applications.John Guest shut-off valves are designed for temporary maintenance of downstream components or assemblies. They must be used only in the positions “fully open” or “fully closed.”Key Benefits:Suitable for 3/8" tube connectionsPerfect for water filters, reverse osmosis and drinking water systemsQuick, tool-free installation with push-fit technologyStrong, food-grade plastic constructionDurable and reliable performanceDesigned only for fully open or fully closed operationThe shut-off valves must not be used as follows:as flow control (only partially open)as a permanent pipe end (here we recommend using our end caps.)only connected on one sideas a tap or faucet

The John Guest shut-off valve delivers reliability and precision for controlling water flow in filtration systems, reverse osmosis units, and other water treatment setups. Its push-fit connection system ensures fast, secure installation without tools, saving time and effort during setup or maintenance.Built from durable, high-quality plastic with a smooth-turning blue lever handle, this valve provides long-lasting performance and leak-free operation. Ideal for use in drinking water applications, water filters, and coolers where dependable shut-off functionality is essential.Important note: These shut-off valves are not suitable for compressed air, explosive gases, petroleum, or any other liquids, nor for use in heating systems or similar applications.John Guest valves are designed to allow temporary maintenance of downstream components or assemblies and must only be used in fully open or fully closed positions.Key Benefits:Quick and secure push-fit connectionIdeal for reverse osmosis systems and water filtersDurable, corrosion-resistant body for long lifeSmooth, reliable operation with easy lever controlDesigned for easy maintenance and consistent performanceThe shut-off valves must not be used as follows:as flow control (only partially open)as a permanent pipe end (here we recommend using our end caps.)only connected on one sideas a tap or faucet

The John Guest T-Connector with 15 mm outer diameter provides a secure and long-lasting connection for water filtration systems, reverse osmosis setups, and other applications involving drinking water. Its reliable push-fit design ensures a tight seal without the need for tools or sealing materials. Simply insert the tubing and enjoy a solid, pressure-resistant connection.This connector is perfect for branching water lines in three directions, whether you are installing a reverse osmosis system or expanding an existing water filter setup. The durable plastic body offers excellent resistance to pressure, temperature, and chemicals, ensuring a long service life and consistent performance.With its precise fit and trusted John Guest quality, the T-Connector guarantees maximum safety and efficiency. Suitable for professional installations as well as home projects, it delivers reliability, comfort, and convenience to any water filtration system.Key Benefits:Easy push-fit connection – no tools neededSuitable for water filters, RO systems, and beverage equipmentDurable and high-quality plastic constructionSecure and leak-free connectionPerfect for 15 mm tubing branchesFood-grade and NSF certifiedThe connectors are also ideal for air, non-flammable gases (e.g. N2 and CO2) and vacuum applications.

Features: For sealing threaded connections Resistant to all aggressive fluids No sticking and swelling thus prevents seizing of threads Dimensions: width = 12mm, length = 12m, thickness = 0,08mm Weight per unit area: 25 g/m² Material: polytetrafluoroethylene Temperature resistance: -240 to 240 °C Pressure: max. 25 bar The alignment of the threaded connection is permitted, including limited reverse turning.NoteSince temperature and pressure are interdependent, simultaneous stressing with the maximum values is impossible. Furthermore, the specifications depend on the respective medium. Therefore, due to many possible applications, these specifications can only serve as a guideline (see also DVGW approval).

Features: For sealing threaded connections Resistant to all aggressive fluidsNo sticking and swelling thus prevent seizing of the threads Suitable for coarse threads DN 12 - DN 50Dimensions: width = 12mm, length = 12m, thickness = 0,1mm Weight per unit area: 100 g/m² Material: polytetrafluoroethylene Temperature resistance: -240 to 240 °C Pressure: max. 25 bar The alignment of the threaded connection is permitted, including limited reverse turning.NoteSince temperature and pressure are interdependent, simultaneous stressing with the maximum values is impossible. Furthermore, the specifications depend on the respective medium. Therefore, due to many possible applications, these specifications can only serve as a guideline (see also DVGW approval).

Features: For sealing threaded connections Resistant to all aggressive fluidsNo sticking and swelling thus prevent seizing of the threads Suitable for fine threads max. DN 10Dimensions: width = 12mm, length = 12m, thickness = 0,1mm Weight per unit area: 60 g/m² Material: polytetrafluoroethylene Temperature resistance: -240 to 240 °C Pressure: max. 25 bar The alignment of the threaded connection is permitted, including limited reverse turning.NoteSince temperature and pressure are interdependent, simultaneous stressing with the maximum values is impossible. Furthermore, the specifications depend on the respective medium. Therefore, due to many possible applications, these specifications can only serve as a guideline (see also DVGW approval).

The John Guest Push-Fit Connector 15 mm x 3/4" Male Thread (Part No. PM011516E) provides a dependable and durable solution for connecting tubing in water filters, reverse osmosis systems, and filtration equipment. Designed for precision and safety, it ensures a tight and reliable seal that supports long-lasting performance in both residential and commercial applications.Made from high-quality acetal material, this fitting delivers excellent resistance to pressure and temperature changes. It fits perfectly into home water filters, drinking water systems, and professional filtration setups. The quick-connect design allows for easy installation and removal without the need for tools, making maintenance and system upgrades straightforward and efficient.With this original John Guest fitting, users benefit from proven quality and reliability. The precisely machined threads and smooth push-fit connection ensure a leak-free performance, even under demanding conditions. It’s the perfect choice for anyone who wants to maintain or expand their water purification system with trusted components.Key Benefits:Connects 15 mm OD tubing to 3/4" female thread (BSPF)Fast, tool-free installationLeak-proof and long-lasting performanceFood-grade and safe for drinking water systemsIdeal for water filters, reverse osmosis units, and spare partsGenuine John Guest qualityThe connectors are also ideal for air, non-flammable gases (e.g. N2 and CO2) and vacuum applications.