Watts 0887718|WW0887718 - RETRO 800M4-FR 1

This 1 inch retrofit pressure vacuum breaker repair kit for series 800M4-FR prevents the reverse flow of polluted water from entering into the potable water supply due to backsiphonage. It consists of a float, spring, bonnet and bonnet O-ring. It is ideal in health hazard continuous pressure applications such as irrigation systems and industrial process water systems where the water enters the equipment at or below its flood rim.