McDonnell & Miller 325400 Head Gasket

The McDonnell & Miller 325400 Head Gasket (Model 150-14) is a critical component designed specifically for sealing flat flange head units in 150, 93, and 193 Series low water cut-offs and pump controllers. Unlike the 150-14H variant, this OEM replacement gasket features a solid design with no mounting holes, ensuring a precise fit for older or specialized flat face flange configurations where a standard 8-hole gasket would fail to provide uniform compression. Built to withstand the high-pressure environment of steam boiler systems, this boiler control gasket prevents steam and water bypass, maintaining the integrity of your water level control assembly. Using the correct McDonnell & Miller 150-14 part is essential for contractors performing boiler maintenance to prevent localized leaks and ensure the mechanical head seats correctly against the body. This authentic replacement head gasket is engineered for durability and thermal resistance in heavy-duty commercial and industrial applications.

• Precise Seating: Specifically engineered for flat flange head units to provide 100% surface contact and eliminate leak paths.
• OEM Compatibility: Direct replacement for McDonnell & Miller 325400, ensuring zero-gap fits for 93, 193, and 150 Series controls.
• No-Hole Architecture: The specialized no mounting hole design allows for maximum compression across the continuous flange surface.
• High-Temp Performance: Designed to maintain a secure seal under fluctuating steam pressures and high-temperature conditions.

• What is the difference between the 150-14 and 150-14H gaskets? The 150-14 is for flat flange heads and has no holes, while the 150-14H is for raised face flanges and typically includes 8 bolt holes.
• Will this fit a Series 157S low water cut-off? Only if your specific 157S unit utilizes the older flat flange configuration rather than the modern raised face head.
• Can I use this gasket for other brands of pump controllers? No, this is specifically toleranced for McDonnell & Miller equipment to ensure proper safety and performance.

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.