John Guest Speedfit 12mm Non Return / Check Valve

Ensure clean and reliable water flow with the John Guest Speedfit 12mm Non-Return Valve, a compact and efficient check valve ideal for campervans, motorhomes, caravans, and self-build water systems.

Designed specifically for clean water applications, this valve prevents backflow and protects your system’s integrity. The low headloss design delivers optimal performance without sacrificing pressure, while the push-fit collet system allows for quick, tool-free installation—perfect for both professionals and DIY van builders.

Made from corrosion-resistant materials and fully demountable for easy maintenance, this check valve is a long-lasting, UK-assembled solution trusted across the leisure and plumbing industries.