Watts Watts Drain Tubes & Fittings 1/8 in. Brass FPT x MPT Service Check Valve 1/8 SCV
This service check valve is an excellent choice to facilitate the servicing of system components without the need to drain the system. It is designed to work when installed between the system and the component. This valve is spring loaded, which allows it to open to system pressure when component is loaded, and close when component is removed, maintaining system integrity.