Technicians should verify HVAC part compatibility using model and serial numbers to ensure this specific thermal cutoff matches original factory specifications for the air handler or furnace assembly

always use a new gasket

It maintains the same physical dimensions and hole patterns across compatible 47

this orifice is sized specifically for the higher energy density and pressure requirements of liquid propane

McDonnell & Miller 310800 Gasket Technicians should verify HVAC partThe McDonnell & Miller 310800 Gasket is a critical sealing component engineered specifically for the 21 Series and 221 Series float operated water feeders. Also identified by model number 21 12, this 4 hole valve body gasket provides a high integrity seal between the valve assembly housing, the strainer body, and the feeder flange. In steam and hot water boiler applications, maintaining a leak proof connection at the make up water feeder is essential