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Zurn Wilkins 3/4" 350 Double Check Backflow Preventer with SAE flare test fitting

1-1/4 Inch Brass Check Valve, One-Way Non Return In Line Spring Check Valve with Backflow Prevention, 1.25’’ NPT Male in 1.25’’ FNPT out for Garden Hose Well Pumps Irrigation Systems Chemical Industry

Zurn Wilkins 112-950XL3 1-1/2" 950XL3 Double Check Backflow Preventer

Boltigen Stainless Steel 304 1/2" NPT Spring Check Valve, 1000 PSI, -20C to 200C, Industrial Check Valve, 2 Ports, NPT Connections

YACO INDUSTRY Hydraulic Oil cylinder check valve 1/4"" NPTF 5000PSI steel,precision machining, actuator pump Non-return single way valve

Zurn Wilkins 112-350XL 1-1/2" 350XL Double Check Backflow Preventer

Zurn Wilkins 2-950XL3 2" 950XL3 Double Check Backflow Preventer

Zurn Wilkins 3/4" 975XL2 Reduced Pressure Principle Backflow Preventer with strainer and air gap