1" & 1 1/2" (25-38 mm) NON RETURN VALVES
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Large bore inline non-return valves to prevent waste water backing up into your shower tray, particularly when travelling up or down hills or when the waste tank is full. Can also be used to maintain prime in a suction pipe, to a macerator pump etc. in marine applications. Available for 1" (25mm) & 1 1/2" (38mm) hose.
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