McDonnell & Miller 51S-2-HD Replacement Head

McDonnell & Miller 51S-2-HD is a replacement head with cutoff designed for the 51S boiler line. This OEM-grade component fits 136200 assemblies, delivering precise shutdown and reliable safety for your boiler system.

Engineered for dependable performance, the 51S-2-HD replaces worn or failed heads quickly, minimizing downtime and extending the life of your boiler. Whether you are performing routine maintenance or a field repair, this replacement head ensures consistent operation and peace of mind.

• Durable construction with high-grade materials for long service life
• Precise cutoff mechanism for safe, automatic shutdown
• Easy retrofit for 51S series boilers with minimal downtime
• Simple installation with standard fittings and compatible connectors
• OEM-grade replacement part that preserves original performance and reliability

Invest in the McDonnell & Miller 51S-2-HD to maintain optimal boiler control, safety, and efficiency. A smart choice for service technicians and facility managers seeking quality replacement parts for the 51S and 136200 configurations.