The 1 inch 800M4 pressure vacuum breaker prevenst the reverse flow of polluted water from entering into the potable water supply due to backsiphonage. It consists of bronze body construction, silicone rubber check valve disc, plastic check valve seat, stainless steel springs, a bonnet with silicone rubber O-ring seal, a lightweight plastic disc float, tee handle or lever handle shutoffs, and test cocks for winterization draining. It is ideal in continuous pressure health hazard applications such as on irrigation systems and industrial process water systems.
