Frostproof Wall Hydrant Inlet Size 3/4 in FNPT Wall Thickness 14 in Recommended Wall Opening 2 in x 3-7/8 in Length 18 in Includes Vacuum Breaker and Key Handle Type Loose Key Casing Material Polished Brass Outlet Size 3/4 in Hose Max Pressure 125 psi Max Temp 120 Degrees F Standards ASSE GOVERNMENT SPEC WW-P-541b IAPMO