A.Y. McDonald's unique Angle Dual Check Backflow Valves have meter swivel nut or iron yoke inlets and a wide variety of outlet configurations. Angle dual checks can be ordered on our copper meter setters, resetters, insetters and iron yokes or they can be used independently.

Our top cap and unique perpendicular check module design assures convenient access to both checks for inspection, maintenance or replacement without removing the valve from the line. It also allows for a lower profile than traditional top entry dual checks. Backflow of water is still deterred if either of the checks are removed or inoperable.

Key to Sizes:
1 = 1/2"
2 = 5/8"
3 = 3/4"
4 = 1"
5 = 1 1/4"

For TEST KIT order part number 4135-303

Thermal Expansion Warning
Creating a closed condition in a hot water system with the installation of a non-return barrier (such as a Check Valve or Backflow Preventer between the system piping and the public supply) can result in extreme pressure rises caused by thermal expansion and/or water hammer. This thermal expansion can damage piping, valves, and other components in the system. The installation of a pressure relief device or thermal expansion tank can avoid possible damages.