Spa Quip Check Valve 40mm

Works great. Compatible with my existing check valves.

I bought these because my old check valve was worn out. The internals of these new valves swapped straight into my old valves and worked well. That saved me having to cut and glue pipework to suit new valves. Winning! As you can see in the photo, it’s easy to see when something gets stuck in the valve, which doesn’t happen often.