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.

Made of solid brass for strength and durability

Excellent for use with expansion tanks， float vents， and pressure gauges

Adapts to standard pipe thread

Spring loaded

Facilitate the servicing of components under pressure

For boiler applications