CMP 25830-150-000 - HydroSeal Spring Check ValveCMP 25830 150 000 HydroSeal Spring Check Valve is a black CPVC serviceable check valve with a 2 pound spring. It has a 1 1 2 inch socket x 2 inch spigot connection for one way flow control in pool and spa plumbing. It is part of the HydroSeal thread on cover line, which is built for service access without cutting the valve out of the line. Key Features: Black CPVC body 2 pound spring 1 1 2 inch socket 2 inch spigot