Series 157S – Low Water Cut-Off/Pump Controllers

McDonnell & Miller : Combination Low Water Cut-Offs/Pump Controllers :

Features and Benefits

  • For residential, commercial and industrial low or high
  • pressure boiler applications
  • For boilers of any steaming capacity
  • Monel bellows provides corrosion resistance
  • Float chamber with integral water column provided
  • Snap action for high temperature service
  • – 1 Single pole, single throw switch for pump control
  • – 1 Single pole, double throw switch for low water
  • cut-off and alarm actuation
  • Optional features
  • – Manual reset
  • – Integral conductance probes for additional levels and
  • greater operating differential-Model 157S-RBP-MD
  • – 1″ or 11⁄4″ NPT equalizing tappings
  • – 1⁄2″ or 3⁄4″ NPT tappings for gauge glass/tri-cock
  • installations
  • – BSPT threads
  • Maximum pressure 150 psi (10.5 kg/cm2)
  • For new electronic 150E Series see page 37
  • Model 157S-MD
  • Maximum differential operation
  • – Prevents nuisance burner shutdowns in low pressure
  • applications
  • – Maximum operating pressure 50 psi (3.5 kg/

Installation/Operation Manuals

Parts Lists

    Specifications

      To build and operate an efficient water system, you need both the right products and experts who know the application. Here, you can access our trusted network of partners who have the experience you need to get the job done right.

      To find Representative in Canada select your Province:

      Find your local dealer
      Postal Code
      Distance
      Province

      Find International Representatives