McDonnell & Miller 150S (171702) Level Controller
Model: MM150S
Low Price: $510.00

McDonnell & Miller 150S (171702) Level Controller

By: McDonnell & Miller Model: MM150S ID: 26504

More Views

Low Price: $510.00
Bread Checkout
Authorized McDonnell & Miller Dealer





The McDonnell & Miller Model 150Sis a mechanical float-type ON/OFF level controller and low water cut-off. The controller is piped into an external water column via 1” NPT equalizing pipes. The 150S is typically used to control a two-position makeup valve. When used on a boiler, the controller also includes a single pole double throw (SPDT) switch for low water cutoff and alarm. The 150S is rated for a maximum pressure of 150 PSI. A single McDonnell & Miller 150S is commonly paired with an electronictwo position makeup valve for ON/OFF operation. The snap action switches have a 3/4" fixed control range. That is, the makeup valve will open when the level is 5/8” above the “Cut-off line” and the valve will close when level is 1-3/8” above the “Cut-off line”. This type of control is common for applications where maintaining a steady flow into the tanks is not required, for example, small atmospheric feed tanks (less than 500 gallons). For larger atmospheric tanks and deaerators, a modulation makeup valve is typically used for more precise control.

  • ON/OFF level controller
  • Maximum Operating Pressure: 150 PSI
  • Connects to tank via 1” NPT equalizing pipes
  • Includes cast iron float housing
  • 3/4” differential control range for pump control
  • 7/8” differential control range for burner control (when used on boiler)
  • 2 precisionsnap action switches
  • 1 SPST switch for pump control, 7.4 amps at 120VAC (3.7 amps at 240 VAC)
  • 1 SPDT switch for burner control and alarm, 1 amp at 120 VAC (0.5 amps at 240 VAC)


Additional Information

Manufacturer McDonnell & Miller
Weight (in lbs) 25.7000
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety Information PROPOSITION 65 WARNING



Be the first to review this product

Write Your Own Review

You're reviewing: McDonnell & Miller 150S (171702) Level Controller

How do you rate this product? *

1 1 star
2 2 star
3 3 star
4 4 star
5 5 star

Product Q & A

Product Questions
Ask a Question Ask a Question

Sort By: 


Why Buy From Us?

Customer Satisfaction

Our dedicated staff works hard to ensure that all orders are handled quickly and efficiently to ensure that you get what you ordered as quickly as possible.



We provide a secure online shopping experience to protect your information. We also provide the option to checkout with PayPal to allow you to use a checkout service you are familiar with.


Save Money

Our low price guarantee provides you with confidence and piece of mind, knowing you purchased a quality product at a great price


See What Our Customers are Saying

Coupon: df56s5d8
Customer Reviews