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Keep your backflow preventer in top condition with the Watts Series 800 M4 Vacuum Breaker Repair Kit, specifically designed for models that are 1 inch in size. This comprehensive kit comes with everything you need to repair and maintain your backflow preventer, including a bonnet O-ring and float vent disc assembly with vent float, seal, and spring. The kit is made in the USA and sold by a Veteran-Owned Business. It is ideal for commercial and residential applications where backflow prevention is necessary to protect water supply systems from contamination or pressure loss. With easy-to-order online convenience and quick shipping, you'll have everything you need to keep your plumbing system in top working order with the Watts Series 800 M4 Vacuum Breaker Repair Kit.