Replacement intervals generally range from 3 to 6 months depending on local environmental factors and odor concentrations

This thermal disc switch is built for durability in high-cycle environments

Thermal Protection: Equipped with an automatic reset thermal overload to protect the windings during extreme ambient temperatures

and Thermal Zone units

McDonnell & Miller 63-M Low Water Cut Off 30067439-890 Replacement intervals generally range fromThe 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