Boiler Water Supply Valve - the Watts 911S "Dual Valve" gets it's nickname because it is a combination back-flow preventor and (PRV) pressure reducing valve. Watts 911S provides safe make-up water, preventing a backflow condition. Designed for use with a residencial size hydronic (water) heating boiler, water pressure is reduced to 15 psi, and is adjustable within a range of 10-25 psi. Watts 911S also prevents a harmful backflow condition. Watts 911S is a 1/2 Inch copper Sweat X 1/2" FIP connection.

Legend Valves Backflow Preventor Atmostpheric Vent

Legend Valves Dual Check Backflow Preventer

Legend Valves Backflow Preventors Atmospheric Vent

Series SD-3 Dual Check Valves with Atmospheric Port & Strainer for Carbonated Beverage, Coffee and Tea Machines, tehe watts SD-3 is used to prevent the reverse flow of polluted water in a domestic(potable)water line.

4" submersible deep well pump. Powered by 2-wire Franklin Electric motor. Built-in check valve prevent backflow and ensures system pressure.

Prier C-754 Heavy Commercial Hot & Cold Mixing Hydrant provides a year round source of tempered water to areas of structures that are subject to freezing temperatures. The hydrant valve is connected to the supply piping in the heated portion of the structure, eliminating the possibility of freezing. The Hydrant comes with a self-draining vacuum breaker and backflow check valve to protect against any cross contamination possibilities. Common applications include garbage can wash stations at restaurants and service station bay washers.

Prier Anti-Siphon Angle Sill Faucets are designed for areas that require water service with an anti-siphon backflow check valve connection, but are not subject to freezing temperatures.

Prier Anti-Siphon Angle Sill Faucets are designed for areas that require water service with an anti-siphon backflow check valve connection, but are not subject to freezing temperatures.

Prier Anti-Siphon Angle Sill Faucets are designed for areas that require water service with an anti-siphon backflow check valve connection, but are not subject to freezing temperatures.