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This part is a direct replacement for Lennox 89M77
ensuring the internal media does not degrade over the service interval
though the damping piston allows for versatility in various line configurations
condensate backup in the pressure tubing can reach the diaphragm
or if the DC resistance is significantly different from 7
McDonnell & Miller RB-24E-L Control Els PW 17895 This part is a directThe McDonnell & Miller RB 24E L (Part Number 144690) is a specialized residential low water cut off designed for 24V hot water boiler systems. This electronic LWCO utilizes a 3 4" NPT probe style sensing element to monitor for hazardous low water conditions, ensuring the burner circuit is interrupted before equipment damage occurs. Unlike manual reset models, this unit features an auto reset function that restores operation once the water level