Description
Overview
The McDonnell & Miller 93-M-HD (Part Number 162600) is a heavy-duty combination low water cut off and pump controller engineered for reliable protection and precise control on steam boiler systems. This head mechanism-only unit is designed for direct installation on compatible boiler bodies, providing both low water cut off protection and pump control functions in a single, robust assembly.
Key Features
- Combination low water cut off and pump controller in one unit
- Two snap-acting, manual reset SPDT (Single-Pole Double-Throw) switches for dependable circuit control
- 150 PSI maximum pressure rating — suitable for a wide range of steam boiler applications
- Head mechanism only — designed to mount on existing boiler body or compatible McDonnell & Miller body assemblies
- Manual reset design provides an added layer of safety, requiring deliberate operator action before resuming operation after a low water event
- Heavy-duty (HD) construction for demanding commercial and industrial steam boiler environments
Application
The 93-M-HD is ideal for steam boilers in commercial and industrial settings where both low water protection and pump control are required. The dual SPDT switch configuration allows independent control of the pump and burner circuits, maximizing system safety and operational efficiency.
Specifications
- Part Number: 162600
- SKU: 93-M-HD
- Brand: McDonnell & Miller (Xylem)
- Switch Type: Two Snap-Acting Manual Reset SPDT Switches
- Maximum Pressure: 150 PSI
- Application: Steam Boilers
- Configuration: Head Mechanism Only
Why Choose the McDonnell & Miller 93-M-HD?
McDonnell & Miller, a trusted Xylem brand, has been the industry standard in boiler low water cut off controls for decades. The 93-M-HD delivers the reliability, safety, and heavy-duty performance that HVAC professionals and boiler operators demand. Its manual reset SPDT switches ensure that any low water condition is acknowledged and corrected before the system restarts, protecting your boiler investment and ensuring safe operation.







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