FPI / Waterco 40/50mm 2 way valve
Waterco FPI 2 way valve. Suits 40mm or 50mm pipes.
Glue 40mm pipe inside the valve or 50mm pipe can be attached via a 50mm coupling.
Very common valve.
You can also remove the centre for retro fitting into a worn out existing FPI valve if you didn't want to cut the old valve out.