The John Guest push-fit acetal single check valve is designed to prevent reverse flow or back siphonage, offering reliable protection against Fluid Category 2 risks. Its low headloss design makes it suitable for potable liquids, foodstuffs, intermittent hot water (up to 50°C, in line with the British Beer & Pub Association Code of Practice), as well as water treatment and purification systems.

Quick and straightforward to install, John Guest valves provide an instant push-fit connection and a leak-tight seal—without the need for tools, heat, or sealing compounds. The innovative collet locking mechanism ensures the pipe is held securely in place without deformation or flow restriction. These valves are corrosion resistant and fully demountable, helping to enhance system performance and minimise maintenance downtime.

All John Guest fittings are proudly manufactured and assembled in the UK.