McDonnell & Miller 63-B Low Water Cut Off 320788-702 but the locking mechanism and

but the locking mechanism and SPST action remain the same

UL Listed: Meets rigorous safety standards for use in commercial and industrial environments

For professional-grade reliability in York gas furnaces

Multi-Speed Versatility: Features 4-speed taps to allow for custom airflow balancing

The valve features a nickel-plated forged brass body

McDonnell & Miller 63-B Low Water Cut Off 320788-702 but the locking mechanism andThe 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