Prevent the reverse flow of polluted water from entering into a potable water supply with this 3/4 in. lead free anti-siphon pressure vacuum breaker backflow preventer. It’s perfect for irrigation systems and industrial process water systems and is constructed of a bronze body. It includes a silicone rubber check valve disc, stainless steel springs, plastic check valve seat, a lightweight plastic disc float, bonnet with silicone rubber O-ring seal, test cocks for winterization and a tee handle shutoff. The minimum pressure is 15 PSI (55 kPa) up 150 PSI (10.3 bar).