The ASCO SC8238T410 1" N/C Solenoid Valve is an electrically operated normally closed valve designed to control air or water flow in compatible HVAC and fluid-handling systems. When energized, the solenoid opens the valve to permit flow; when power is removed, it closes to stop circulation. Suitable for boilers, hydronic heating systems, water control applications, and other compatibl... https://www.partshnc.com/sc8238t410-asco-1-nc-solenoid-valve-air-water-5-175-psi-120v