63-B-M | LWCO M/R W/FLOAT BLOCK #143300 | Xylem-McDonnell & Miller

The 63-B-M from Xylem-McDonnell & Miller is a Low Water Cutoff (LWCO) with a float block, designed for use in boilers and hot water heating systems. The LWCO is a safety device that automatically shuts off the fuel supply to the boiler if the water level drops below a safe level. The float block moves up and down with the water level and when the water level drops below the safe level, the float block drops and activates a switch that shuts off the fuel supply. The LWCO is a critical safety device that helps to prevent boiler explosions and damage to the boiler and heating system. Our shop our HVAC supply store offers the best prices and fast shipping for your products!