Plastic Single Check Valve

A compact, push-fit check valve designed to allow flow in one direction while preventing backflow in fluid systems. Ideal for protecting equipment and maintaining system integrity, the valve features a spring-loaded internal mechanism for reliable one-way operation.
John Guest push-fit fittings provide a quick and reliable solution for creating airtight connections without the need for tools, heat, or sealants. Ideal for potable water systems in RVs, caravans, boats, and residential setups, these fittings streamline installation and significantly reduce setup time compared to traditional methods. The fittings use a unique collet locking mechanism that securely holds the pipe in place without damaging it or restricting flow. They can also be easily disconnected and reused, making them well-suited for systems requiring routine maintenance or future modification. Constructed from robust acetal copolymer and featuring a nitrile O-ring, the fittings are compatible with a variety of tubing materials, including nylon, LLDPE, powder-coated aluminium, copper, and PEXa. All fittings are manufactured and assembled in the UK, and are suitable for use in industrial, commercial, and food-grade applications.
Key Features:
•Compatible with 1/2" (12mm) Speedfit pipe and Twist & Lock fittings
•Durable acetal copolymer material with nitrile O-rings
•Backflow prevention up to Fluid Category 2
•Suitable for hot and cold water systems (up to 65°C)
•Handles pressures up to 150 PSI (10 bar)
•Accepts potable water, compressed air, CO₂, and nitrogen
•Quick installation – push pipe directly into fitting without tools
•Fittings can be disconnected and reused without damaging components
•Made from FDA compliant material
•NSF51 & NSF61 International certified