Atmospheric Vacuum Breaker Size 3/4 in Connection Type GHT Material of Construction Lead Free Copper Silicon Alloy Seal Rubber Max Pressure 125 psi Temp Range 33 Degrees to 180 Degrees F Height 1 1/2 in Width 1 1/2 in Standards ASSE 1011 CSA B64.2 UPC Compliance ANSI A112.1.3 ASSE 1011 Lead Free