Watts 800M4 Vacuum Breaker Repair Kit 1/2-3/4 in

Watts 800M4 Vacuum Breaker Repair Kit

This Watts 800M4 kit provides replacement components for Watts Series 800 vacuum breakers sized from 1/2 to 3/4 in. It suits plumbers and facility managers who must restore backflow protection on existing assemblies. The package includes a bonnet O-ring and a check disc vent seal. Buyers needing parts for other series or sizes should look elsewhere.

Build quality and daily implications

Genuine Watts rubber components match the original material specifications for reliable sealing. The bonnet O-ring and check disc vent seal install directly into the Series 800 body without special tools. California Proposition 65 notice applies because the product contains a chemical known to the State of California to cause birth defects or other reproductive harm.

Compatibility check before ordering

Verify that the installed vacuum breaker is a Watts Series 800 model designated M4 or 1/2 to 3/4 in. Confirm the bonnet and check disc dimensions correspond to the existing hardware. This kit does not fit other series, larger diameters or different manufacturers' bodies. Check local code requirements for approved repair parts.