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The WATTS 888151 is a replacement RV seat kit designed for use with the Watts 919 series reduced-pressure zone (RPZ) backflow preventer assembly. This kit provides the seating components necessary to restore proper valve function and maintain backflow protection in pressurized water systems. It is sized to fit 3/4-inch to 1-inch valve bodies. Licensed plumbers and backflow prevention specialists install this kit during scheduled maintenance or when seat wear causes valve failure or leakage. Weighing 0.5 pounds, it is compact and straightforward to stock as a service part.
This seat kit is intended for repair and maintenance of the Watts 919 series backflow preventer, a reduced-pressure zone assembly commonly found in commercial and residential potable water systems, irrigation lines, and industrial supply plumbing. It is applicable to 3/4-inch and 1-inch valve configurations in that series. Installers typically carry this kit when servicing existing assemblies in the field rather than replacing the full device.
Designed for use with the Watts 919 series reduced-pressure zone backflow preventer in 3/4-inch and 1-inch valve sizes.
Installation should be performed by a licensed plumber or certified backflow prevention tester. Shut off the upstream water supply and relieve system pressure before disassembling the valve body. Follow all applicable local plumbing codes and the valve manufacturer service documentation when replacing internal seat components. Re-test the assembly for proper backflow prevention function after reassembly.
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