A compromised or cracked frame can lead to improper air bypass

By replacing a carbon-fouled or cracked ignitor with this genuine York component

Installation is streamlined via the 1/4" flare nut with capillary connection

System Compatibility: Engineered as a direct 61-20649-04 replacement for specific Rheem and Ruud hydronic and refrigeration units

As the direct OEM replacement for part number B1360719

McDonnell & Miller 51-S-2 Switch 30067439-890 A compromised or cracked frameThe McDonnell & Miller 51 S 2 is a heavy duty mechanical water feeder and low water cut off (LWCO) designed for low pressure steam and hot water boilers. Engineered for systems with a maximum vessel pressure of 35 psi, this unit features a snap acting SPDT switch that ensures positive electrical contact for burner control or alarm signaling. The 1" NPT connections allow for straightforward integration into existing boiler piping, providing a reliable