Installation is fast and straightforward: John Guest valves form an instant push‑fit connection with a reliable, leak‑tight seal—no tools, heat, or sealing compounds required. The unique collet‑locking mechanism grips the pipe securely without distortion or flow restriction. Corrosion‑resistant and fully demountable, these push‑fit valves enhance system performance and minimise downtime during maintenance. 

The John Guest grey push‑fit acetal stop valve (long‑handle version) provides quick isolation of the supply to an appliance or fixture with a simple ¼‑turn operation. It features a full‑bore design and is engineered for use in brewing and soft‑drink systems, as well as potable water, air, and inert gases such as N₂/CO₂ (up to a maximum of 50°C and in line with the British Beer and Pub Association Code of Practice). All John Guest fittings are manufactured and assembled in the UK.