McDonnell & Miller 63-M Low Water Cut Off Refrigerant Improved Performance: Restores the valve's

Improved Performance: Restores the valve's original "metallic click" and tight sealing to prevent hazardous leaks

The NEMA 1 enclosure (IP40 rated) and flat profile design allow for mounting in ultra-confined spaces with minimal side clearance

preventing water damage to the furnace plenum and surrounding structure

This differential pressure switch acts as an air proving switch

Can I use this for both LP and Natural Gas

McDonnell & Miller 63-M Low Water Cut Off Refrigerant Improved Performance: Restores the valve'sThe McDonnell & Miller 63 M (Part Number 143100) is a heavy duty, float operated mechanical low water cut off designed for superior reliability in both hot water and steam boiler applications. Built for contractors who require a dependable safety interface, this unit features a manual reset mechanism and a robust No. 2 dual switch assembly. These switches provide simultaneous low water cut off protection and a dedicated circuit for an electric water