Very Reliable Double Union Non Return Valve. The PVC-U made Non return valve is spring loaded, also with the advantage of waste particles that can be removed by unscrewing the double union fittings.
The Double Union Non Return Valve provides a simple means of preventing backflow in pipe work where this would be undesirable.
This Double Union Non Return Valve (check) Valve is probably unique in its design and is the first we have been able to find where the valve can be removed for periodic cleaning etc ..
It will fit any PVC or ABS 1.5 inch imperial Pipework and is solvent weld also.
The Spring loaded Non Return Valve does create some back pressure, please use the Flapper Non return valve if this is not suitable.