A veteran tech will tell you to replace the gasket every time the pilot tube or pilot generator is serviced to prevent nuisance service calls related to air leaks or pilot drop-outs

using an OEM replacement prefilter like the F825-0337 is the industry standard for sustaining optimal airflow and protecting the more sensitive internal components of the HVAC system from heavy dust and debris buildup

Broad Compatibility: Seamlessly fits HE220 through HE365 series models

Are repair internal components available for this model

Enhanced Robustness: Constructed with high-tolerance internal components to prevent pilot tube clogging and sliding block failure

McDonnell & Miller 247-2 Water Feeder THPU32HP7Y A veteran tech will tellThe 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