Lennox 54M90 Orifice 321042-401 Using an R-22 valve on

Using an R-22 valve on an R410A system will lead to improper mass flow rates and potential compressor damage due to the significant pressure differences between the two refrigerants

Always verify your pump's construction code and size before installation

Failure is typically caused by a short circuit in the 24V secondary side

437-inch diameter

Reduces downtime by providing pre-formed bends that eliminate field-fabrication errors

Lennox 54M90 Orifice 321042-401 Using an R-22 valve onThe Lennox 54M90 LP Orifice is a critical metering component designed for precise gas to propane conversion in compatible Lennox heating units. Engineered for durability and high tolerance performance, this 0. 034 inch orifice ensures steady pressure regulation and fuel flow, preventing common combustion issues such as soot buildup or irregular flame patterns. For contractors performing a Lennox furnace LP conversion, using OEM spec orifices is