Xylem-McDonnell & Miller 63-B-M Low Water Cut-Off Manual Reset Float Block 143300

The Xylem-McDonnell & Miller 63-B-M Lwco M/R W/Float Block 143300 is a low water cut-off (LWCO) control with a magnetic relay and float block for hydronic heating systems. By automatically turning off the boiler when the water level drops below a safe level and averting any overheating and damage, it performs a critical role in safety. This part uses a float mechanism to detect changes in the water level and is usually put in the boiler's wet leg. The float activates a switch that shuts off the boiler's electricity when the water level falls, stopping it from operating again until the water level is restored. This prevents damage to the boiler and helps the hydronic heating system run safely and dependably by maintaining the appropriate water level.