the CMH-20 head pressure control prevents evaporator coil freeze-ups and ensures consistent refrigerant flow during off-season cooling demands

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Supports UL-listed diaphragm valve configurations and CUL motorized valve systems

CCW Rotation: Verified counter-clockwise rotation ensures compatibility with standard right-hand fan wheel configurations

This specific 120VAC coil is a critical component for maintaining the pressurized integrity of ASCO RedHat valves

Resideo WT8840C1500 Gas Valve 320819-301 the CMH-20 head pressure controlThe Resideo WT8840C1500 is an integrated gas control valve engineered for residential tank type gas water heaters utilizing an atmospheric vent system. This service and replacement part consolidates temperature regulation, pilot management, and safety shutoff protocols into a single high reliability unit. Designed for natural gas systems, the valve is calibrated for 4" water column (WC) manifold pressure, ensuring stable burner operation and precise