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Watts 740 045 FS 2 Part of the 740 Series Access Tile and a 40 mesh screen and a 40 mesh screen This 2 inch lead free double check valve backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backpressure and or backsiphonage in accordance with national plumbing codes and water authority requirements Includes a nonrestrictive discharge drain line flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve and pressure relief setpoint of 45 psi
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