Vacuum Breaker Size 1/2 in Connection Type FNPT Material of Construction Lead Free Cast Copper Silicone Alloy Max Pressure 150 psi Temp Range 33 Degrees to 140 Degrees F Height 6 1/4 in Width 2 1/4 in Standards ANSI ASSE 1020 CSA Certified NSF Certified UPC USC Manual Section 10