Watts 800M4 1/2-3/4 1st Check Kit bath faucet part

Repair Kit for Series 800 Vacuum Breakers

This Watts 800M4 1st Check Kit is a vacuum breaker repair kit designed for use with Watts Series 800 models sized from 1/2 to 3/4 inch. It contains a bonnet O-ring, a check disc assembly with holder, and a check spring. The kit addresses worn internal components to restore proper backflow prevention function. It is intended for maintenance professionals and property owners servicing these specific valves.

Verify Valve Series and Size Before Ordering

Confirm that the existing valve body is a Watts Series 800 unit with a nominal size between 1/2 and 3/4 inch before purchasing this kit. The components inside are dimensioned for that specific series and size range only. California Proposition 65 notice applies as the product contains a chemical known to the state to cause birth defects or reproductive harm. No other tools or parts are included in this package.

Suits Technicians Servicing Watts Series 800 Valves

This kit suits maintenance teams and plumbers who need to rebuild the first check mechanism on a Watts Series 800 vacuum breaker within the stated size range. It is not for buyers who need a complete vacuum breaker assembly or a repair kit for a different valve series or manufacturer. Installers requiring parts for larger diameters or different models should look elsewhere.