2-1/2\” Backflow Preventer, Double Check, Lead-Free , Stainless Steel Body with Flanged OS&Y Gate Valves APOLLO4ALF10903 FEATURES Domestic Stainless steel body: 2 8 FDA epoxy coated ductile iron body: 10 & 12 Easy maintenance no special tools required Snap-in check retainers: 2 6 Bolted-in checks: 8 12 Low pressure loss as documented by an independent laboratory Center stem guided TriForceTM check valves Approved for horizontal (2 12) and vertical flow up (2 8) US Patent Nos. 6,443,184; 7,025,085; 7,533,699 Made in the USA ARRA Compliant PERFORMANCE RATING Maximum Working Pressure 175 psi Temperature Range 33 F 140 F Hydrostatic Test Pressure 350 psi APPROVALS Sizes 2 , 3, 4, 6: AWWA C510 Sizes 2 12: ASSE 1015, CSA B64.5, FM, IAPMO, UL*, cUL* *UL and cUL installations must include indicating-type shut-off valves Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California (2-1/2 – 8)