Everbilt Anti-Siphon Frost-Proof Sillcock ensure protection against undesirable freezing and back siphoning. Because they're frost-proof, they can stop outside water intakes from freezing and bursting pipes. Additionally, the Anti-Siphon feature protects against water siphoning back to contaminate your drinking water system. Also, unlike Anti-Siphon attachments, which must be manually drained to prevent freezing, the integral Anti-Siphon design is self draining. Product Depth (in.) 3.41 Product Width (in.) 15.25 Product Height (in.) 2.75 Valve Inlet Diameter (in.) .5 Product Length (in.) 3.5 Valve Outlet Diameter (in.) .75 COMPATIBLE DETAILS Pipe Material Steel Maximum Working Temperature (F) 100 Connection MHT x MIP Product Weight (lb.) 1.48 lb Indoor/Outdoor Rating 125 psi Exterior Material Brass Maximum Pressure (PSI) 125