26" WC on rise to ensure precise safety cut-offs for specific residential furnace platforms

the 3/8" SAE flare side relies on a mechanical compression seal

verify that the orifice is clear of oil and debris to maintain flow coefficients

A failed heater allows refrigerant to mix with the oil

Contamination from skin oils can cause the silicon nitride element to fail prematurely when it reaches operating temperature

McDonnell & Miller 343400 Float and Gasket Els PW 17895 26" WC on rise toWhen you are performing an annual teardown on a McDonnell & Miller Series 63 low water cut off, the 343400 Float and Gasket assembly (Model SA63 30) is a standard replacement for maintaining system integrity. This OEM kit includes the precision engineered float, the CO 12 head gasket, and the necessary rod component to ensure accurate liquid level sensing in high demand steam and hot water boiler applications. Designed for a maximum boiler pressure of