McDonnell & Miller
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
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176220 McDonnell & Miller 157S-R Hi Pressure Level Control
McDonnell & Miller
$1,657.95176220 McDonnell & Miller 157S-R Hi Pressure Level Control. McDonnell & Miller 150S/157S Instruction Manual Features For boilers of any steaming capacity Model 175802 - 157S-P Monel bellows provides corrosion resistance Snap action...$1,657.95 -
143702 McDonnell & Miller Mechanical LWCO 64A-M
McDonnell & Miller
$981.95143702 McDonnell & Miller Mechanical Low Water Cut Off 64A-M. Mechanical For Steam Boilers. Mcdonnell & Miller LWCO Series 64 Instruction Manual Features: Optional manual reset is available For boilers of any steaming...$981.95 -
135800 McDonnell & Miller 51-S-HD Head Mechanism
McDonnell & Miller
$1,424.95135800 - McDonnell & Miller 51-S-HD Head Mechanism for Mechanical Water Feeder. This Item Usually Ships The Same Day!$1,424.95 -
171907 McDonnell & Miller Low Pressure Cut-Off 1575
McDonnell & Miller
$1,609.95171907 McDonnell & Miller Low Pressure Cut-Off 1575 Low water cut-off and pump control for steam and hot water boilers. 250 psi with 1" pipe tappings. Probe chamber with three probes and control unit. This Item Usually Ships The Same Day!$1,609.95 -
165700 McDonnell & Miller Level Control 94A-7B
McDonnell & Miller
$2,621.95165700 McDonnell & Miller High Pressure Combination Level Control 94A-7B. Mcdonnell & Miller Submittal Sheet Features For commercial and industrial low or high pressure steam boilers Maintains consistent water level regardless of...$2,621.95 -
165800 McDonnell & Miller High Pressure Level Control 94AM
McDonnell & Miller
$1,947.95165800 McDonnell & Miller High Pressure Level Control 94AM. Mcdonnell & Miller Submittal Sheet Features For commercial and industrial low or high pressure steam boilers Maintains consistent water level regardless of pressure For...$1,947.95 -
166300 McDonnell & Miller High Pressure Level Control 94-7B
McDonnell & Miller
$2,658.95166300 McDonnell & Miller High Pressure Level Control 94-7B. Information: McDonnell & Miller Submittal Sheet Features For commercial and industrial low or high pressure steam boilers Maintains consistent water level regardless of...$2,658.95 -
119760 McDonnell & Miller FS7-4DS - 1-1/4" Flow Switch
McDonnell & Miller
$1,121.95McDonnell & Miller FS7-4DS - 1-1/4" Flow Switch With Stainless Steel Body - w/2 SPDT Switches 119760. Information: McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: Universal design serves the...$1,121.95 -
114793 McDonnell & Miller FS5-DS-1 - 1" Flow Switch
McDonnell & Miller
$1,154.95114793 McDonnell & Miller FS5-DS-1 - 1" Flow Switch With Stainless Steel Body, 2 SPDT Switches 114793. McDonnell & Miller FS5 Instruction Manual Features: In-line configuration eliminates need for a pipe tee Sizes available: 3/4" NPT,...$1,154.95 -
181425 McDonnell & Miller Relief Valve 250-3/4-45
McDonnell & Miller
$184.95181425 McDonnell & Miller Relief Valve 250-3/4-45. Features and Benefits: For tanks and hydronic heating systems Protects against over-pressure Minimizes hammering with flash steam Low differential pressure – 3 psi (.21 kg/cm2) between...$184.95 -
181325 McDonnell & Miller Relief Valve 250-3/4-36
McDonnell & Miller
$184.95181325 McDonnell & Miller Relief Valve 250-3/4-36. Features and Benefits: For tanks and hydronic heating systems Protects against over-pressure Minimizes hammering with flash steam Low differential pressure – 3 psi (.21 kg/cm2) between...$184.95