... of solar panel, piping, valves, fittings, pumps, safety showers, nozzles, freeze sensitive equipmen. The NJC freeze protection valves utilize a reliable self-contained Thermal ... wrench * Discharges the minimum amount of water required to prevent freeze damage ModelPort SizeOpen~Close Temperature(°C)Maximum Operating Temperature(°C ... )LF47 F/P 45DN153~6+951.01.0Φ25*87165 freeze prevention vavle