Watts LF909 4" NRS Lead Free Reduced Pressure Zone Assembly and Flood Sensor

Watts LF909 4 inch lead free reduced pressure zone backflow preventer assembly prevents the reverse flow of polluted water from entering into the potable water supply. The assembly has an epoxy coated cast iron body, non-rising stem resilient seated gate valves, captured spring check valves, replaceable seats, top mounted test cocks, and a field reversible pressure differential relief valve.