McDonnell & Miller 69 Cut Off R-410A Complete Assembly: Includes the ignitor

Complete Assembly: Includes the ignitor gasket (PLT1151K) for a leak-proof combustion chamber seal

Operating on 24 VAC/VDC power

to match specific appliance requirements

Key Benefits: System Compatibility: Precision-fit for Reznor UDAP/UDBP 300-400 and UDX series heater models

McDonnell & Miller 69 Cut Off R-410A Complete Assembly: Includes the ignitorThe McDonnell & Miller 153900 (Series 69) is a professional grade mechanical low water cut off designed for reliability in low pressure steam boiler applications. This auto reset unit features a 4 1 8" insertion length and is engineered for mounting directly into 2 1 2" NPT boiler side tappings, making it compatible with residential and commercial boilers of any steaming capacity. By utilizing a packless bellows and a dual switch assembly, this