Watts LF757DCDA-DOSY-CFM 4 - Part of the LF757DCDA Series SITEDRAIN The relief valve outlet includes

The relief valve outlet includes a drain tube connection with a 3/4 inch barb fitting

In-line applications

UPC - 098268637175

Z645-3NH-AR

Watts LF757DCDA-DOSY-CFM 4 - Part of the LF757DCDA Series SITEDRAIN The relief valve outlet includesThis 4 IN lead free double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. It is designed for non health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. It is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water