Watts LFM115 150 E 30-300 LS 6 - Part of the LFM115 Series HDPE This first check repair kit

Watts LFM115 150 E 30 300 LS 6 Part of the LFM115 Series HDPE This first check repair kit This first check repair kit provides all the parts necessary to repair or replace the first check on a 2 1 2 to 4 inch double check valve assembly backflow preventer This 3 4 inch lead free reduced pressure zone backflow preventer assembly with its exclusive design incorporating the patented air in and water out principle for protection during an emergency condition prevents the flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements