McDonnell & Miller 328300 Fittings

The McDonnell & Miller 328300, also identified as the MA159 Quick Hook-Up Fittings, is a critical component for maintaining the efficiency of steam boiler systems. Specifically engineered for seamless compatibility with Series 42A, 47, 64A, and 42S-A low water cut-offs and pump controllers, these fittings eliminate the need for complex field-fabricated piping. This boiler control replacement part includes the upper and lower quick hook-up fittings along with the essential Y-assembly, ensuring a rigid and leak-proof installation. By utilizing these McDonnell & Miller service parts, contractors can ensure precise water level monitoring and prevent nuisance boiler shutdowns. The robust construction is designed to withstand high-pressure steam environments, providing long-term reliability for commercial and industrial hydronic systems. Integrating the MA159 fitting kit simplifies the repair of pump control mechanisms, allowing for faster turnaround times on the job site without compromising system integrity.

Key Benefits

• Universal Compatibility: Specifically designed for Series 42A, 47, 64A, and 42S-A boiler controls.
• Streamlined Installation: Simplifies the mounting of low water cut-offs with a standardized quick hook-up design.
• Durable Construction: High-grade materials ensure performance under standard steam operating pressures.
• Complete Assembly: Includes necessary components for a full hook-up repair, reducing the need for additional individual parts.

Common Questions

Which boiler models are compatible with the MA159?
The MA159 is designed for use with McDonnell & Miller Series 42A, 47, 64A, and 42S-A controllers. It is a direct fit for these specific pneumatic and mechanical water level controls.

Does this kit include the Y-assembly?
Yes, the 328300 kit typically includes the upper and lower fittings along with the black Y-assembly required for a complete install.

Can these fittings be used on high-pressure steam boilers?
These fittings are rated for the standard operating pressures of the compatible McDonnell & Miller series; always verify your specific boiler's PSI rating against the controller specifications.

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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.