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Watts LF709 DNRS IOT 4 Part of the LF709 Series ZC100F 6NH This 3 4 inch lead free This 3 4 inch lead free dual check valve backflow preventer with atmospheric vent prevents the reverse flow of hot or cold polluted water from entering into the potable water supply Specifications Body Material Bronze Brand Watts EAN 098268564020 GPM When Relieved Does Not Apply to Product Inlet Connection Size 3 4 IN Inlet Connection Type Female Threaded Inlet Thread Type NPTF Lead Free NO Maximum Temperature Fahrenheit 210 Maximum Working Pressure PSI 75 Outlet Connection Size 3 4 IN Outlet Connection Type Female Threaded Outlet Thread Type NPTF Part Number F257560 Pressure Range Does not apply to product Pressure Relief Setting PSI 100 Protection Type Temperature And Pressure Series 140 Shank Length Does Not Apply To Product Temperature Relief Fahrenheit 210 Thermostat Material Nylon Coated Copper Thermostat Probe Length 5 IN Specification Sheet 40