McDonnell & Miller 342500 Assembly

When you're servicing McDonnell & Miller Series 51 or Series 851 mechanical water feeders, the McDonnell & Miller 342500 Assembly (Model SA51-101-102) is the direct OEM replacement for a worn valve and strainer. This complete kit integrates the valve, cartridge, and strainer with the basket in a single housing, ensuring you aren't chasing small leaks or flow issues across older components. For steam and hot water applications, maintaining the makeup water feeder valve is essential to prevent boiler flooding or low-water dry firing. The technical design features a high-performance strainer basket that captures scale and sediment before it fouls the cartridge poppet. When the float assembly signals for water, this valve provides a precise response, keeping your heating system operating within manufacturer specifications. It’s a standard HVAC replacement part for any technician's truck when dealing with high-capacity boiler water feeders.

• OEM Direct Replacement: Engineered specifically for Series 51 and Series 851 water feeders to ensure perfect fitment and operation.
• Debris Protection: Includes a heavy-duty strainer with basket to shield the internal valve cartridge from pipe scale and system sediment.
• Field Serviceable: The modular cartridge and strainer assembly allows for simplified maintenance without having to replace the entire feeder body.
• Consistent Performance: Restores the original water level control accuracy, preventing inefficient cycling and protecting the boiler from water level fluctuations.

Will this work with the McDonnell & Miller 51-2 model?
Yes, the SA51-101-102 is the correct valve assembly for the 51, 51-2, and 851 controls.

Does this kit include the gasket?
Yes, the assembly includes the necessary internal components and gaskets required for a standard valve replacement.

Do I need to lubricate the cartridge O-rings?
Yes, for optimal performance, use a silicone-based lubricant on the cartridge O-rings during installation to ensure a proper seal.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.