Watts 957-OSY-FXG 4 - Part of the 957 Series SITEDRAIN blowout-proof lead free brass stem

blowout-proof lead free brass stem

or locking grate as needed

Slotted grate with isolation nipple to regulate drainage and block debris

Epoxy-coated cast iron body with anchor flange and dual weepholes for seepage control

such as rust

Watts 957-OSY-FXG 4 - Part of the 957 Series SITEDRAIN blowout-proof lead free brass stemThis 4 inch reduced pressure zone assembly backflow preventer helps prevent the reverse flow of fire protection substances and water of non potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. This extremely compact and lighter than a traditional designed assembly is approved for horizontal installation as long