5.0 out of 5 (2 reviews)
Exactly as described, small compact and neat and easy to fit compared with a larger 15 mm brass check valve which came with my hot tap from a different supplier.— Ian Link ✓


MPN
£16.99 inc. VAT
*Applies when Next Day Delivery is selected at checkout.
Order before the delivery cut-off for the fastest available dispatch. Delivery options and final prices are confirmed at checkout.
Our size guide and fitting advice help you choose the right connection first time.
View Size GuideNot sure which fitting you need? Our experts are here to help you choose the right size and fitting for your system.
Learn moreThe John Guest Single Check Valve with 3/8" push-fit connections is designed to prevent back-flow of treated water into the mains water supply, which is required by UK bylaw.
Designed to connect easily in-line with water filtration systems, the John Guest single check valve is the quick and easy solution to ensuring filtered or treated water does not find it's way back into the mains supply.
Ensures peace of mind and compliance with UK law.
Official John Guest video
Orders are usually dispatched within one working day. Free UK delivery is available on orders over £50, with next day delivery available at checkout.
The John Guest Single Check Valve with 3/8" push-fit connections is designed to prevent back-flow of treated water into the mains water supply, which is required by UK bylaw.
Designed to connect easily in-line with water filtration systems, the John Guest single check valve is the quick and easy solution to ensuring filtered or treated water does not find it's way back into the mains supply.
Ensures peace of mind and compliance with UK law.
Official John Guest video
Orders are usually dispatched within one working day. Free UK delivery is available on orders over £50, with next day delivery available at checkout.