McDonnell & Miller 60-101 Casting

The McDonnell & Miller 60-101 Replacement Casting is a critical industrial-grade component engineered for the repair and maintenance of Series 61, Series 63, Series 64, and Series 65 Low Water Cut Offs (LWCO). This replacement casting provides a precise, high-tolerance fit to restore the structural integrity of your boiler’s water level control system. Designed for low water cut off parts maintenance, the 60-101 ensures the float chamber remains leak-proof and properly aligned, preventing dangerous dry-fire conditions in commercial and residential steam or hot water boilers. When your existing boiler water level control housing shows signs of thermal fatigue, pitting, or internal scale buildup that impedes float movement, swapping the head mechanism or switches alone isn't enough. Utilizing this heavy-duty McDonnell & Miller casting allows technicians to rebuild the unit to original specifications, ensuring reliable burner shutdown performance and operational safety across multiple Xylem McDonnell & Miller product lines.

• Multi-Series Compatibility: Engineered specifically for Series 61, 63, 64, and 65 models, facilitating streamlined inventory for multi-facility contractors.
• Industrial Durability: Robust construction designed to withstand high-pressure steam environments and constant thermal cycling without warping.
• Precise Float Alignment: Restores the internal geometry required for unobstructed float travel, mitigating the risk of "sticking" due to chamber corrosion.
• Seamless Integration: Machined to OEM specifications for a direct-fit replacement, reducing labor time during emergency boiler control repairs.

Can the 60-101 casting be used on both steam and hot water applications?
Yes, as long as it is paired with the appropriate 61, 63, 64, or 65 series internal components, it is suitable for both steam and hot water low water cut-off systems.

When should a technician replace the casting instead of just the head mechanism?
If the internal walls of the float chamber show significant pitting, heavy sludge accumulation that cannot be cleared, or any hairline fractures, the 60-101 replacement casting should be installed to ensure system safety.

Does this part include the gaskets or the float assembly?
The 60-101 is the casting only. It is recommended to purchase a new gasket and inspect the float and bellows assembly separately when performing a full chamber replacement.

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.