John Guest 12mm Single Check Valve (12SCV)
John Guest is ideal for many DIY builds. John Guest Speedfit is a easy push-fit system suitable for the plumbing of hot and cold water services and for your larger appliances such as an Truma Combi 4e.
This John Guest 12mm Check Valve allows for a simple and quick push to fit installation either end for 12mm JG pipe. The one-way valve or check valve ensures water only flows through in one direction to prevent the back flow of contaminants.
John Guest 12mm Single Check Valve Pipe Tolerances
These John Guest fittings are intended for pipes with outside diameters of 12mm to fit to rigid 12mm pipework.
Made compatible for 12mm John Guest pipe only. Not flexible hose.
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For More info Related to John Guest, see John Guests Official Site