Watts 800M4QT 3/4″ Bronze Anti-Siphon Pressure Vacuum Breaker w/1/4 Turn Shutoff
It consists of bronze body construction, silicone rubber check valve disc, plastic check valve seat, stainless steel springs, tee handle shutoff, a bonnet with silicone rubber O-ring seal, a lightweight plastic disc float, and test cocks for winterization draining.