• Original parts ensure long service life
• No special tools are required for servicing
• All parts are made of high-quality materials

This 1-inch check repair kit is designed for a pressure vacuum breaker, series 800m4, which prevents the reverse flow of polluted water from entering the potable water supply due to back siphonage. This kit consists of a check disc assembly (disc and disc holder), bonnet O-ring, and check spring.