For contractors managing commercial air handling units

Designed specifically for Level 4 networking requirements

verify the flue configuration

What does the orange lead wire indicate

The self-centering clamping shaft adapter simplifies installation on various shaft sizes

Watts 0391009 Ball Valve Refrigerant For contractors managing commercial airThe Watts 0391009 is a 1 inch Lead Free LF909 QT reduced pressure zone (RPZ) backflow preventer assembly, designed to provide high hazard protection against backsiphonage and backpressure in potable water systems. This model serves as the direct replacement for the older 909QT 1 series, featuring a modular check valve design for streamlined field maintenance. The integrated 1 4 turn ball valves provide reliable shut off capability and easy testing