Reduced Pressure Zone Backflow Preventer Series Apollo 4ALF-200 Size 1/2 in Connection FNPT Body Material Lead Free Bronze Temp Range 33 Degrees to 180 Degrees F Max Temp 180 Degrees F Max Pressure 175 psi Width 2 7/8 in Length 10 7/8 in Height 7 1/8 in Standards ARRA ASSE 1013 CSA B64.4 USC FCCCHR