McDonnell & Miller 247-2 Water Feeder R-410A extending the life of connected

extending the life of connected bearings and seals

For larger pipe diameters

it eliminates the guesswork of universal seals that fail under thermal expansion

it is recommended to verify if additional flange gaskets (like the 100483 series) are required for your specific furnace model during the swap

The standard GM40AV model is a synchronous drive unit

McDonnell & Miller 247-2 Water Feeder R-410A extending the life of connectedThe McDonnell & Miller 247 2 (Part Number 133800) is a heavy duty mechanical water feeder specifically designed for steam and hot water boilers requiring consistent cold water makeup. This unit features a built in No. 2 Switch, providing integrated Low Water Cut Off (LWCO) functionality with two snap acting SPDT switches. This configuration ensures that if the water level drops below a safe threshold, the burner circuit is interrupted while