Watts 009 M2 1 1/4 - 1 1/2 1st Check Kit bath faucet part

First Check Valve Repair Kit

The Watts 009 M2 First Check Kit is a replacement check-valve assembly designed for Watts Series 009 backflow preventers in sizes from 1-1/4 to 1-1/2 inches. It restores the device's ability to stop reverse flow in potable water systems. The kit includes the check assembly and a cover O-ring for a complete seal renewal. It is intended for maintenance professionals and facility managers servicing these specific valves.

Replaces worn internal check components

This kit addresses internal wear that allows water to leak past the first check valve, a common failure mode during annual testing. The jump is worth it when a backflow preventer fails its test due to debris, mineral buildup or seat deterioration on the first check only. It avoids the cost and labour of replacing the entire valve body while returning the assembly to compliant operation. Installers should verify the exact model and size marking before ordering.

Sustained pressure and debris tolerance

Under continuous supply pressure the replacement check maintains a tight seal against backpressure and backsiphonage conditions. The materials resist chlorinated water and typical sediment without rapid degradation. The included cover O-ring ensures the bonnet joint stays leak-free through repeated thermal cycles. The kit does not alter the valve's rated flow capacity or pressure loss characteristics.