Very Reliable Double Union Non Return Valve, this non return valve has minimum resistance also with the advantage of waste particules 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 i.e in pumped systems or where Elecro heaters are fitted in line.
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 ..
Truly a superb piece of kit, it will fit any PVC or ABS 1.5" imperial Pipework and is solvent weld also