 Very Reliable Transparant non return Valve with spring, this non return valve has minimum resistance also with the advantage of waste particules that can be seen due to the transparant PVC body.
This Non Return (check) Valve is probably unique in its design and is the first we have been able to find that has a clear viewing window and where the valve can be removed for periodic cleaning etc ..
Truly a superb piece of kit, it will fit any PVC or ABS 1.5" imperial Pipework and is solvent weld also.
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