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System Safety: Maintains the specific CFM requirements needed to actuate the combustion safety circuit and maintain venting integrity
providing reliable power handling for inductive and resistive HVAC loads
ensuring compliance with local jurisdictional codes when venting to the atmosphere
the burner circuit is interrupted and requires a manual technician intervention to restart the system
Watts 0391009 Ball Valve Refrigerant System Safety: Maintains the specificThe 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
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