Reduced Pressure Zone Backflow Preventer Series Wilkins 975XL2 Size 1/4 in Connection FNPT Body Material Low Lead Cast Bronze Temp Range 33 Degrees to 180 Degrees F Max Temp 180 Degrees F Max Pressure 175 psi Width 4 1/4 in Length 5 3/4 in Standards Annex G Approved By The Foundation for Cross Connection Control and Hydraulic Research At The University of Southern California ASSE Listed 1013 CSA Lead Plumbing Law Certified By IAPMO R T NSF-Standard 61