• Factory replacement kit No special tools required for changing parts All parts are made of high quality materials Bonnet kit

This 3/8-1/2 IN backflow preventer bonnet repair kit, series 008, is used to prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage on indoor point-of-use applications. It consists of a bonnet, bonnet O-ring and vent spring. It is ideal for indoor use on machines or equipment in general plumbing applications.