Febco - LF856DCDA-DOSY-CFM 4 - Part of the LF856 Series detectable-warning-mat-finder torsion spring check valves and

torsion spring check valves and comes furnished with a gallon per minute meter to detect underground leaks and unauthorized water use

air and non-condensable gases from heating systems

quarter-turn ball valves with tee handles

It has a free area of 137 square inches

The fabric is flexible and permeable

Febco - LF856DCDA-DOSY-CFM 4 - Part of the LF856 Series detectable-warning-mat-finder torsion spring check valves andThis 4 inch lead free MasterSeries double check detector backflow preventer assembly prevents the backflow of pollutants due to backsiphonage and or backpressure that are objectionable but not toxic, from entering into the potable water supply. It is ideal for protection of non health hazard cross connections or for containment at the service line entrance. It is used primarily on fire sprinkler and standpipe systems requiring detection of