Watts LF757DCDA-OSY-CFM 4 - Part of the LF757DCDA Series ZA100F-3NH model 115-2

model 115-2

Specified for green-roof walkway and patio drainage applications

This 1 inch lead free anti-siphon vacuum breaker backflow preventer for hot or cold water prevents the reverse flow of polluted water from entering into the potable water supply due to backsiphonage

air and non-condensable gases from heating systems

Watts LF757DCDA-OSY-CFM 4 - Part of the LF757DCDA Series ZA100F-3NH model 115-2This 4 inch lead free testable double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri link check valves, two shutoff valves, and four test cocks. It features a stainless steel housing and sleeve and is 70 percent lighter than traditional designs. It is designed for non health