This Watts 0387126 800M4-QT-1-1/4" Watts series 800M4QT anti-siphon pressure vacuum breaker backflow preventer helps prevent 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, lever handle shutoffs, and test cocks for winterization draining. It is ideal in health hazard continuous pressure applications such as irrigation systems and industrial process water systems where the water enters the equipment at or below its flood rim. Maximum pressure is 150 psi (10.3 bar). Minimum pressure is 15 psi (55kPa).

Watts 0387126 - 800M4-QT-1-1/4 - 1-1/4" Bronze Anti-Siphon Pressure Vacuum Breaker Backflow Preventer with 1-1/4" FNPT Connections, Quarter Turn Shutoff, Lever Handle.

This Watts LF009M3QT-3/4", 0391003 Lead Free Reduced Pressure Zone Backflow Preventer is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and for contaminants at the service line entrance. This assembly consists of a lead free bronze body, 3/4 inch NPT end connections, quarter turn ball valve shutoffs with tee handles, top mounted test cocks, two in-line independent check valves, captured springs, and replaceable check seats with an internal relief valve for reduced space requirements.