McDonnell & Miller 63-B Low Water Cut Off 323055-751 Built with a totally enclosed

Built with a totally enclosed motor housing

Technician-Ready: Includes all necessary bracket hardware for a 30-second heat-up profile

and units produced before Jan 2003

This unit is a direct replacement for the France 5LAY-32 ignitor and includes all necessary hardware for a fast

and bore size of the existing wheel to ensure an exact match

McDonnell & Miller 63-B Low Water Cut Off 323055-751 Built with a totally enclosedThe McDonnell & Miller 63 B (Part Number 142700) is a heavy duty, float operated mechanical low water cut off engineered for reliable performance in residential and commercial hot water and steam boilers. As a veteran grade boiler safety control, this unit features an automatic reset and a 1" NPT threaded connection, rated for a maximum pressure of 50 PSI. The integrated float block design ensures stable operation by reducing float movement caused by