3/4" Sweat 556 Geothermal Valve
Taco 556-G3 is a 2-way style Geothermal Zone Valve with 3/4" Sweat.
Taco 556-G3 is specially designed for high head, open system zone control. The unique end switch design permits control of the heat pump by the valve allowing movement of cold water into the coil before the heat pump starts. Reliable built-in Heat Motor, wax filled element and microprocessor-based actuator tab provide unmatched flow control and improve comfort and energy efficiency. Taco 556-G2 Geothermal Zone Valve provides quiet and dependable operation with consistent performance.
Warranty:3 Year Head, 5 Year Body Warranty
I have this on an open loop Water Furnace Envision Heat Pump. The system is a year an a half old and I am on my 3rd Actuator. For some reason this fails open and when you're on an open loop this is an expensive failure.