John Guest Single Check Valve - 1/4" Push Fit

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The John Guest Single Check Valve with 1/4" push-fit connections is designed to prevent back-flow of treated water into the mains water supply, which is required by UK bylaw. Desig ned 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 its way back into the mains supply. Ensures peace of mind and compliance with UK law. Show more