Check valve - 3/8“ tube OD - John Guest

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 ASV9 angle valve adapter from John Guest is the perfect solution for connecting water filters, reverse osmosis systems and other appliances directly to your cold water supply. With its precise 3/8" thread and 1/4" tube connection, it offers the standard size for most water filter systems, ensuring maximum compatibility.The built-in check valve reliably prevents backflow into the water line, while the integrated shut-off valve makes it easy to stop the water flow whenever maintenance or filter replacement is required. This ensures safety and convenience for your water filter or reverse osmosis system.Made from durable brass and high-quality plastic, the ASV9 provides a secure and long-lasting connection. With this John Guest spare part, you get proven quality and reliable performance for your water installation.Benefits at a glance:Standard 1/4" size for reverse osmosis systems and water filtersIntegrated check valve for safe operationConvenient shut-off valve for easy maintenanceHigh-quality materials for long-lasting useSuitable for coffee machines, water dispensers and water treatmentThe product range is not suitable for compressed air, explosive gases, petroleum, or other liquids or in heating systems or similar applications.

The ASV7 angle valve adapter from John Guest is the ideal choice when you need to connect a 3/8" plastic tube to your water filter or reverse osmosis system. It is mounted directly onto the cold water angle valve under the sink, creating a stable and secure connection.Equipped with an integrated check valve, the adapter protects your water installation against backflow. The built-in shut-off valve allows for easy water supply interruption, making filter changes and maintenance particularly convenient. A practical and reliable spare part for various kitchen and water treatment applications.Thanks to robust brass connections and premium plastic components, the ASV7 guarantees long-lasting performance and a reliable seal. John Guest stands for quality you can trust in every installation.Benefits at a glance:Compatible with 3/8" plastic tubingCheck valve for backflow protectionShut-off valve for convenient maintenanceStrong brass and plastic constructionSuitable for filter systems and water installationsThe product range is not suitable for compressed air, explosive gases, petroleum, or other liquids or in heating systems or similar applications.