McDonnell & Miller

McDonnell & Miller

  • 114765 McDonnell & Miller FS5-J-3/4 - 3/4" Flow Switch

    114765 McDonnell & Miller FS5-J-3/4 - 3/4" Flow Switch

    McDonnell & Miller

    114765 McDonnell & Miller FS5-J-3/4 - 3/4" Flow Switch. McDonnell & Miller FS5 Instruction Manual Features: In-line configuration eliminates need for a pipe tee
    Availability:
    This Item Usually Ships The Same Day!
    Weight:
    3.00 LBS
  • 175402 McDonnell & Miller 157S-M Hi Pressure Level Control

    175402 McDonnell & Miller 157S-M Hi Pressure Level Control

    McDonnell & Miller

    175402 McDonnell & Miller 157S-M Hi Pressure Level Control. *Please note this item is discontinued and replaced by the 172812 McDonnell & Miller 157S-M Hi Pressure Level Control
    Availability:
    This Item Usually Ships The Same Day!
    Weight:
    45.00 LBS
  • 149700 McDonnell & Miller Mechanical Low Water Cut Off 67-M

    149700 McDonnell & Miller Mechanical LWCO 67-M

    McDonnell & Miller

     **Discontinued 149700 McDonnell & Miller Mechanical Low Water Cut Off 67-M. Float Type Low Water Cut Off For Millivolt Service. P/N's
    Availability:
    This Item Usually Ships The Same Day!
    Weight:
    12.00 LBS
  • 137100 McDonnell & Miller 53-2 Mechanical Water Feeder

    137100 McDonnell & Miller 53-2 Mechanical Water Feeder

    McDonnell & Miller

    137100 McDonnell & Miller 53-2 Mechanical Water Feeder. Features: For low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m2 ) with hot or cold water feed Optional...
    Availability:
    This Item Usually Ships The Same Day!
    Weight:
    39.00 LBS
  • 153827-LWCO McDonnell & Miller PSE-801-120 Probe Control
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    153827 LWCO McDonnell & Miller PSE-801-120 Probe Control

    McDonnell & Miller

    $324.95
    The Series 153827-LWCO McDonnell & Miller PSE-801-120 Probe Control type LWCO uses patented technology to monitor changes in water conductivity. When defined parameters are exceeded the new PSE-800...
    Availability:
    This Item Usually Ships The Same Day!
    Weight:
    3.00 LBS
    $324.95
    Add to Cart
  • 153828-LWCO - McDonnell & Miller PSE-801-U-120 Probe Control
    Add to Cart

    153828-LWCO - McDonnell & Miller PSE-801-U-120 Probe Control

    McDonnell & Miller

    $358.95
    The Series 153876 - McDonnell & Miller PS-801-U-120 Probe Control type LWCO uses patented technology to monitor changes in water conductivity. When defined parameters are exceeded the new PSE-800...
    Availability:
    This Item Usually Ships The Same Day!
    Weight:
    3.00 LBS
    $358.95
    Add to Cart
  • 115100 McDonnell & Miller FS4-3T1-1 - 1" Flow Switch

    115100 McDonnell & Miller FS4-3T1-1 - 1" Flow Switch

    McDonnell & Miller

    115100 McDonnell & Miller FS4-3T1-1 - 1" Flow Switch With NPT Body High Flow Switch. McDonnell & Miller FS4 Instruction Manual<
    Availability:
    This Item Usually Ships The Same Day!
    Weight:
    3.00 LBS
  • 163200 McDonnell & Miller 93 LWCO 93-7B-HB
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    163200 McDonnell & Miller 93 LWCO 93-7B-HB

    McDonnell & Miller

    $2,594.95
    163200 McDonnell & Miller 93 LWCO 93-7B-HB, comes with standard number 7B switch, for models #93 and #193 controls. Information:
    Availability:
    This Item Usually Ships The Same Day!
    Weight:
    17.00 LBS
    $2,594.95
    Add to Cart
  • 177251 McDonnell & Miller 157S-RLS-M-MD
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    177251 McDonnell & Miller 157S-RLS-M-MD

    McDonnell & Miller

    $1,557.95
    177251 McDonnell & Miller 157S-RLS-M-MD Hi Pressure Level Control. McDonnell & Miller 150S/157S Instruction Manual <
    Availability:
    This Item Usually Ships The Same Day!
    Weight:
    47.00 LBS
    $1,557.95
    Add to Cart
  • 173702 McDonnell & Miller Hi Pressure Level Control 157S-A

    175802 McDonnell & Miller 157S-P Hi Pressure Level Control

    McDonnell & Miller

    175802 McDonnell & Miller 157S-P Hi Pressure Level Control. McDonnell & Miller 150S/157S Instruction Manual Features For boilers of any steaming capacity Model 175802 - 157
    Availability:
    This Item Usually Ships The Same Day!
    Weight:
    45.00 LBS
  • 129802 McDonnell & Miller LWCO 42S-N Pump Controller
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    129802 McDonnell & Miller LWCO 42S-N Pump Controller

    McDonnell & Miller

    $1,089.95
     129802 McDonnell & Miller LWCO 42S-N Pump Controller. Instruction Manual For residential, commercial, and industrial low and medium pressure steam boilers with a separate water colu
    Availability:
    This Item Usually Ships The Same Day!
    Weight:
    20.00 LBS
    $1,089.95
    Add to Cart

Boiler Controls. McDonnell & Miller Low Water cut-offs are specially designed to protect steam and hot water boilers from the hazards of a low water condition. In operation they will interrupt the electrical current to the firing device, if the water in the system drops below the boiler manufacturer’s minimum safe water level. Our low water cut-offs also provide an additional circuit for a low water alarm, should you desire to install one, for additional protection.

If you have any questions please give us a call at 1-800-781-7405 or email us your request. Sales@NationalPumpSupply.com