Reduced Pressure Zone Backflow Preventer Series Watts 909 Size 1-1/4 In. Connection FNPT Body Material Bronze Temp Range 33 Degrees to 140 Degrees F Max Temp 140 Degrees F Max Pressure 175 psi Width 13-1/2 In. Length 23-1/2 In. Standards ASSE 1013 AWWA C-511-92 CSA B64.4