MCDONNELL & MILLER Combination Low Water Cut-Off/Pump
The MCDONNELL & MILLER Combination Low Water Cut-Off/Pump Controller (SKU 161U59, Mfr Part #94-M-HD) is a replacement HVACR pump, valve and tubing component. This controller integrates low water cut-off and pump…
SKU 3G-OTH-81206
Need installation or engineering help?
Ask a question
Product Description
The MCDONNELL & MILLER Combination Low Water Cut-Off/Pump Controller (SKU 161U59, Mfr Part #94-M-HD) is a replacement HVACR pump, valve and tubing component. This controller integrates low water cut-off and pump control functions into a single device, designed to protect boilers and manage condensate or feedwater pump operation.
Frequently Asked Questions
What is the MCDONNELL & MILLER 94-M-HD combination low water cut-off/pump controller used for?
The MCDONNELL & MILLER 94-M-HD is a combination low water cut-off and pump controller used in steam and hot water boiler systems. It protects boilers from low-water conditions by shutting down the burner and can also control the boiler feed pump, ensuring safe and reliable operation in commercial and industrial HVAC applications.
What are the specifications of the MCDONNELL & MILLER 94-M-HD?
The MCDONNELL & MILLER 94-M-HD is a combination low water cut-off and pump controller. Its manufacturer part number is 94-M-HD. It is designed for use in replacement HVACR pumps, valves, and tubing applications. For detailed electrical ratings and pressure limits, consult the manufacturer's datasheet.
Where to buy the MCDONNELL & MILLER 94-M-HD worldwide?
You can source the MCDONNELL & MILLER 94-M-HD combination low water cut-off/pump controller through 3G Electric. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine replacement parts for industrial boiler systems globally.
How to install the MCDONNELL & MILLER 94-M-HD low water cut-off?
Install the MCDONNELL & MILLER 94-M-HD according to the manufacturer's instructions and local codes. Typically, mount the controller in the boiler's water line, connect electrical wiring per the schematic, and verify proper probe level. Always isolate power before installation and test the cut-off function after commissioning to ensure safe boiler operation.
Used in
Common applications for MCDONNELLMCDONNELL Products
3G Electric supplies MCDONNELL replacement hvacr pumps, valves & tubing. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.













