McDonnell & Miller 63HD Low Water Cut-Off Head Mechanism

McDonnell & Miller 63HD Low Water Cut-Off Head Mechanism is a replacement head mechanism for the McDonnell & Miller 63HD Low Water Cut-Off system. Designed for use on the 63 Series Float Type Low Water Cut-Off, this head mechanism includes a No 2 Switch to ensure quick installation and compatibility.

Perfect for boiler safety control needs, this Type Head Mechanism delivers dependable shut-off and durable performance in demanding boiler environments. As a genuine McDonnell & Miller replacement part, it supports reliable operation of residential and light commercial heating systems.

• Fits 63 Series Float Type Low Water Cut-Off units
• Includes No 2 Switch for immediate replacement
• Type Head Mechanism design for consistent actuation
• McDonnell & Miller brand replacement part
• Durable construction built to withstand boiler environments

Replace worn or failing LWCO head components with this high-quality solution to maintain accurate water level detection and boiler protection.