Valve, Accessory Type Freeze Protection Valve, Color Yellow, Compatible with Brand Haws, Depth 3 1/2 in, Height 3 3/8 in, Width 1 5/8 in, Features Automatic Thermal Actuator Bleed Valve Closes Completely When the Water Climbs Back to 42 Degrees F (5.6 Degrees C), Automatic Thermal Actuator Bleed Valve Opens Water Temperature Below 35 Degrees F (1.7 Degrees C), For Use With Shower, Eyewash, Inlet Pipe Gender Female, Inlet Pipe Size 1/2 in, Inlet Pipe Thread Type NPT, Material Brass