Model S0000-FPV is a freeze protection valve that will initiate flow when the thermostatic actuator senses a temperature of 35°F (1.7°C). It is typically piped to a drain and thereby purging the cold water and bringing fresh water to the valve/fixture to prevent freezing conditions. The valve will remain open until it senses a water temperature of 40°F (4.4°C) or more at which point it will automatically close (resetting itself). The valve features 1/2-14 NPT female threads on each end. The S0000-FPV Valve will be shipped loose (not installed) when specified.