Watts 909 2-1/2 to 3in 1st Check Repair Kit

First Check Valve Repair Kit

This kit restores the first check valve in Watts Series 909 assemblies sized 2-1/2 to 3 inches. It contains two molded disc assemblies, two piston O-rings, two seat O-rings, a cover O-ring, a flow tube O-ring, an RV O-ring and an RV stem O-ring. The components are designed for direct replacement during routine maintenance. It suits plumbers and facility managers who service backflow preventers in commercial or municipal water systems.

Series 909 Compatibility

The repair kit is engineered exclusively for Watts Series 909 devices in the 2-1/2 to 3 inch range. Using it on other series or sizes will result in improper sealing and potential device failure. Verify the model number and valve size on the existing unit before ordering. This specificity ensures the correct tolerances for the first check valve mechanism.

Sustained Pressure Performance

Under continuous line pressure the molded disc assemblies and O-rings maintain a consistent seal without the degradation seen in short-term test bursts. The materials resist creep and compression set over extended service intervals. This reliability reduces the frequency of unscheduled shutdowns for backflow preventer maintenance. The kit supports dependable long-term operation in demanding water supply applications.