McDonnell & Miller 221 Make-Up Water Feeder

The McDonnell & Miller 221 is a low water cut-off and make-up water feeder designed to protect steam and hot water boilers from low water conditions. This combination device automatically feeds water to the boiler when levels drop below safe operating conditions while simultaneously shutting down the burner if water levels become dangerously low.

Key Features:

• Provides both automatic water feed and low water cut-off protection in a single unit
• Suitable for residential and light commercial steam and hot water heating systems
• Automatic reset functionality when proper water level is restored
• Manual reset option available for enhanced safety
• Direct replacement for legacy McDonnell & Miller water feeders
• Proven reliability for boiler protection and water management

The Model 221 helps prevent costly boiler damage from dry firing while maintaining optimal water levels for efficient operation. Essential safety device for maintaining proper boiler function and extending equipment lifespan.