anti syphon, non return valve thingy ma jiggy

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anyone know if i can get one of these to fit on a hose pipe fitting its meant to stop contaminated water going back into the drinking water suppy   :P
cheers
debs

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[PAULW]

Trago Mills
What sort of system are you running off at the moment, are you connecting to the kitchen tap or have you got an outside tap, you can buy a fitting for an outside tap that has fitted a non return valve.

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i have a mixer tap in the kitchen that i have a hose fitting for and this works really well, just bought a pressure washer, will i need one of these things cos the hose fitting doesnt fit into the tap it is just clamped on to it