The Goodman 0151R00186S 7/8 Inch Service Valve is a replacement HVAC component designed for use in compatible air conditioners and heat pump systems. It functions by controlling refrigerant flow and providing a convenient access point for system charging, pressure testing, maintenance, and repairs. Installed within the refrigerant line, the valve helps technicians service the system w... https://www.partshnc.com/0151r00186s-amana-goodman-78-service-valve