McDonnell & Miller 21 Water Feeder R-410A this valve is factory-set at

this valve is factory-set at 150 psi

Pressure Resilience: Specifically rated to pump against internal system pressures up to 250 PSI

As a reliable Power Flame burner part

this SPST (Single Pole Single Throw) vacuum switch verifies that the inducer motor is moving sufficient air to ensure safe venting and combustion before the ignition sequence initiates

the unit must be mounted with this marking facing upward

McDonnell & Miller 21 Water Feeder R-410A this valve is factory-set atThe McDonnell & Miller Series 21 Water Feeder (Part Number 126400) is a heavy duty, float operated make up water feeder engineered specifically for boiler receiver tanks and condensate return systems. This mechanical unit facilitates proportional feed action, ensuring a consistent water level without the abrupt surges associated with solenoid based systems. By utilizing a direct mount design with a 6 bolt 5 3 4" bolt circle, this feeder installs