The John Guest grey push-fit acetal stop valve, featuring a long handle, is designed to isolate the supply to an appliance or fixture with a simple ¼-turn operation. Its full-bore mechanism is specifically engineered for use in brewing and soft drinks, as well as potable water, air, and inert gases such as N₂/CO₂ (up to 50°C, in accordance with the British Beer & Pub Association Code of Practice).

Quick and easy to install, John Guest valves offer an instant push-fit connection and a leak-tight seal—without the need for tools, hot works, or sealing compounds. The unique collet locking system ensures the pipe is held securely without deformation or flow restriction. These valves are corrosion resistant and fully demountable, helping to optimise system performance and minimise maintenance downtime.

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