Marketing InformationThis 1/2 in lead-free spill-resistant atmospheric vacuum breaker backflow preventer prevents the reverse flow of polluted water from entering into the potable water supply due to backsiphonage. It consists of lead-free body construction, silicone rubber check disc, stainless steel springs, a lightweight plastic disc float that minimizes deposits and scaling, a spring loaded atmospheric vent with O-ring and a spill-resistant diaphragm seal. It has a compact, space saving design and it is ideal for health hazard applications requiring continuous pressure such as on chemical dispensers or factory machine equipment. Maximum pressure is 150 psi (10.34 bar). Minimum pressure is 8 psi (0.55 bar).