Caleffi 573503A 3/4" NPT female Inlet/Outlet Dual Check Backflow Preventer Size_1-7/8 1/4''SL (6 mm) Single-End Blade

1/4''SL (6 mm) Single-End Blade

) Discharge Pipe Diameter: 1-1/2" Discharge Rate at 36 ft: 26 GPM Discharge Rate at 3 ft: 50 GPM Shut-off Head: 45 ft Normal Running Time: Depends on number of fixtures

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Caleffi 573503A 3/4" NPT female Inlet/Outlet Dual Check Backflow Preventer Size_1-7/8 1/4''SL (6 mm) Single-End BladeCaleffi 573503A 3 4" NPT Female Inlet Outlet Dual Check Backflow Preventer Dual check continuous pressure backflow preventer with atmospheric vent. DZR low lead brass body. Max working pressure: 175 psi Working temp range: 32 210F Emergency backpressure temp: 250F Compliance with the following codes: IPC, IRC and UPC for use in accordance with the U. S. and Canadian plumbing codes Compliance with the following standards: ASSE 1012 2009 NSF ANSI 372