McDonnell & Miller
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149500 McDonnell & Miller LWCO 67-LQHU
McDonnell & Miller
$498.95149500 McDonnell & Miller Mechanical Low Water Cut Off 67-LQHU. Float Type Low Water Cut Off For Millivolt Service. Mcdonnell & Miller LWCO Series 67 Instruction Manual Mcdonnell & Miller LWCO Series 67 Submittal...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 12.00 LBS
$498.95 -
140100 McDonnell & Miller Mechanical Low Water Cut Off 61
McDonnell & Miller
$574.95140100 McDonnell & Miller Mechanical Low Water Cut Off 61. Mechanical For Steam Boilers. Mcdonnell & Miller LWCO Series 61 Instruction Manual Features: For residential and commercial low pressure steam boiler applications For boilers...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 11.00 LBS
$574.95 -
181525 McDonnell & Miller Relief Valve 250-3/4-50 - 3/4" NPT
McDonnell & Miller
$184.95181525 McDonnell & Miller Relief Valve 250-3/4-50 - 3/4" NPT. Features and Benefits: For tanks and hydronic heating systems Protects against over-pressure Minimizes hammering with flash steam Low differential pressure – 3 psi (.21...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 3.00 LBS
$184.95 -
122800 McDonnell Miller Air Flow Switch Model AF1
McDonnell & Miller
$304.95122800 McDonnell Miller Air Flow Switch Model AF1. McDonnell & Miller AF1 Flow Switch Instruction Manual For general purpose applications with medium and high velocity requirements: Paddle fits 8" (203mm) minimum duct size, or 6" (152mm) if...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 3.00 LBS
$304.95 -
172806 McDonnell & Miller 150S-M Combo LWCO & Pump Controller
McDonnell & Miller
$1,104.95172806 McDonnell & Miller 150S-M Combo LWCO & Pump Controller. McDonnell & Miller 150S Instruction Manual Features and Benefits For commercial and industrial low or high pressure Boiler applications For boilers of any steaming...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 30.00 LBS
$1,104.95 -
129302 McDonnell & Miller 42S Pump Controller LWCO
McDonnell & Miller
$979.95129302 McDonnell & Miller Pump Controller LWCO 42S. Instruction Manual Features: For Residential, Commercial, & Industrial low and medium pressure steam boilers with a separate water column For boilers of any steaming...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 17.00 LBS
$979.95 -
115600 McDonnell & Miller FS6-1 - 1" Flow Switch
McDonnell & Miller
$547.95115600 McDonnell & Miller FS6-1 - 1" Flow Switch-High Sensitivity. This McDonnell & Miller flow switch is for heavy duty applications where high sensitivity is required, such as water treatment systems, cooling systems for electronic circuits,...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 5.00 LBS
$547.95 -
110800 McDonnell & Miller Proportion Switch Only Fits Model 93 & 94 LWCO
McDonnell & Miller
$1,805.95110800 McDonnell & Miller Proportion Switch Only. Fits Model 93, 193 & 94, 194 LWCO's. Information: Mcdonnell & Miller General Catalog Mcdonnell & Miller Service Parts Catalog Mcdonnell & Miller Series 93-94 & 193-194...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 5.00 LBS
$1,805.95 -
144692 McDonnell & Miller RB-24E Low Water Cut Off
McDonnell & Miller
$174.95144692 McDonnell & Miller RB-24E Low Water Cut Off. This Item Usually Ships The Same Day!- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 4.00 LBS
$174.95 -
169400 McDonnell & Miller Water Feeder 101A-120v
McDonnell & Miller
$504.95169400 McDonnell & Miller Water Feeder 101A-120v McDonnell & Miller 101-A Electric Water Feeder Instruction Manual Electric Water Feeder Features: For low pressure steam boilers with cold water feed Eliminates necessity to manually add...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 8.00 LBS
$504.95 -
120060 McDonnell & Miller FS7-4J Flow Switch 1-1 4 BSTP
McDonnell & Miller
$574.95120060 McDonnell & Miller FS7-4J Flow Switch 1-1 4 BSTP. *Please note image is generic. McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: Universal design serves the widest variety of large...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 6.00 LBS
$574.95 -
110300 McDonnell & Miller Model 5 Reset Snap Switch
McDonnell & Miller
$998.95110300 McDonnell & Miller Model 5 Reset Snap Switch for model number 93, 193, 94, and 194 controls. This Item Usually Ships The Same Day!- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 5.00 LBS
$998.95 -
153916 McDonnell & Miller PS-802-U-24 Low Water Cut-Off
McDonnell & Miller
$354.95153916 McDonnell & Miller PS-802-U-24 Low Water Cut-Off. This model has been replaced and the new model is 153928 PSE-802-U-24. This Item Usually Ships The Same Day!- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 5.00 LBS
$354.95 -
120603 McDonnell & Miller FS8-WG - 1" Flow Switch
McDonnell & Miller
120603 McDonnell & Miller FS8-WG - 1" Flow Switch With Gold Plated Switch Contacts 120603. 120603 McDonnell & Miller Instruction Manual Features: For general purpose applications with environmental exposure, or those requiring a...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 2.00 LBS
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115652 McDonnell & Miller FS6-W-1 - 1" Flow Switch
McDonnell & Miller
$584.95115652 McDonnell & Miller FS6-W-1 - 1" Flow Switch With NEMA 4X Enclosure. McDonnell & Miller FS6 Instruction Manual This McDonnell & Miller flow switch is for heavy duty applications where high sensitivity is required, such as water...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 5.00 LBS
$584.95 -
114642 McDonnell & Miller FS4-3DS 1" Flow Switch
McDonnell & Miller
$738.95114642 McDonnell & Miller FS4-3DS 1" Flow Switch With Stainless Steel Body & 2 SPDT switches 114642. McDonnell & Miller FS4 Brochure McDonnell & Miller FS4 Instruction Manual Universal design serves the widest variety of...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 4.00 LBS
$738.95 -
123450 McDonnell & Miller AF3D Air Flow Switch
McDonnell & Miller
123450 McDonnell & Miller Air Flow Switch Model AF3D. McDonnell & Miller AFE-1 Instruction Manual For general purpose low velocity applications where the most economical flow switch is desired. Paddle fits 8" (203mm) minimum duct...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 2.00 LBS
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195000 McDonnell & Miller TC-4 Test & Check Valves
McDonnell & Miller
$737.95195000 McDonnell & Miller TC-4 Test & Check Valves. Information: 195000 Mcdonnell & Miller TC-4 Instruction Manual Features and Benefits: For use on hot water boilers Simplifies ASME CSD-1A. code mandated testing of lowwater...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 7.00 LBS
$737.95 -
176902 McDonnell & Miller 157S-RL Hi Pressure Level Control
McDonnell & Miller
$1,558.95176902 McDonnell & Miller 157S-RL Hi Pressure Level Control. McDonnell & Miller 150S/157S Instruction Manual Specifications For boilers of any steaming capacity Monel bellows provides corrosion resistance Snap action switches for high...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 47.00 LBS
$1,558.95 -
153929-LWCO McDonnell & Miller PSE-802-RX2-24 Low Water Cut Off
McDonnell & Miller
$328.95153929-LWCO McDonnell & Miller PSE-802-RX2-24 Low Water Cut Off. The Series PSE-800 probe type LWCO uses patented technology to monitor changes in water conductivity. When defined parameters are exceeded the new PSE-800 makes a decision to shut...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 3.00 LBS
$328.95 -
129502 McDonnell & Miller 42S-HD Head Mechanism
McDonnell & Miller
$874.95129502 McDonnell & Miller 42S-HD Head Mechanism for 42S, 42S-A. *Please note image is generic. This Item Usually Ships The Same Day!- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 8.00 LBS
$874.95 -
120100 McDonnell & Miller FS7-4E - 1-1/4" Flow Switch
McDonnell & Miller
$844.95120100 McDonnell & Miller FS7-4E - 1-1/4" Flow Switch With NEMA 7 & 9 Enclosure. McDonnell & Miller FS7 Overview McDonnell & Miller FS7 Instruction Manual Features: For hazardous environment applications requiring a NEMA 7...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 13.00 LBS
$844.95 -
162300 McDonnell & Miller 93 Low Water Cut-Off
McDonnell & Miller
$1,668.95162300 McDonnell & Miller Combination Control Model 93 Low Water Cut-Off. Information: McDonnell & Miller LWCO Instruction Manual Features: For commercial and industrial low or high pressure steam boilers Maintains consistent water...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 37.00 LBS
$1,668.95 -
113550 McDonnell & Miller FS1-J Flow Switch
McDonnell & Miller
$332.95113550 McDonnell & Miller FS1-J Flow Switch. *Please note image is generic. McDonnell & Miller FS1 Instruction Manual For general purpose applications where high sensitivity is required and moderate or low flow rates are encountered such as...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 4.00 LBS
$332.95 -
354001 McDonnell & Miller E-11M-24V Manual Reset Switch 24V
McDonnell & Miller
$357.95354001 McDonnell & Miller E-11M-24V Manual Reset Switch 24V. Information: McDonnell & Miller LWCO Series 67 Instruction Manual McDonnell & Miller LWCO Series 67 Submittal Sheet Features: For boilers of any steaming...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 12.00 LBS
$357.95 -
144676 McDonnell & Miller RB-122E Low Water Cut Off
McDonnell & Miller
$174.95144676 - McDonnell & Miller RB-122E Low Water Cut Off. This Item Usually Ships The Same Day!- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 3.00 LBS
$174.95 -
114763 McDonnell & Miller FS5-D-3/4 - 3/4" Flow Switch
McDonnell & Miller
$359.95McDonnell & Miller FS5-D-3/4 - 3/4 Flow Switch With/2 SPDT Switches 114763. McDonnell & Miller FS5 Instruction Manual Features: In-line configuration eliminates need for a pipe tee Sizes available: 3/4" NPT, 1" NPT Materials of...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 3.00 LBS
$359.95 -
181625 McDonnell & Miller Relief Valve 250-3/4-75
McDonnell & Miller
$184.95181625 McDonnell & Miller Relief Valve 250-3/4-75. 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)...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 4.00 LBS
$184.95 -
153602 McDonnell & Miller PSE-802-M-24 Low Water Cut Off
McDonnell & Miller
$378.95The series 153602 - McDonnell & Miller PSE-802-M-24 Low Water Cut Off. The Series PSE-800-M Manual Reset LWCO is a new addition to the McDonnell & Miller probe type low water cut-off group of products. These controls are used as the...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 3.00 LBS
$378.95 -
132900 McDonnell & Miller 47-2-M Mechanical Water Feeder
McDonnell & Miller
$1,258.95132900 McDonnell & Miller 47-2-M Mechanical Water Feeder. Features: For steam and hot water boilers with cold water feed Continuous maintenance of minimum safe water level, independent of electrical service Proportional feed action Quick...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 30.00 LBS
$1,258.95 -
120191 McDonnell & Miller FS7-4SW - 1-1/4" Flow Switch
McDonnell & Miller
$1,097.95120191 McDonnell & Miller FS7-4SW - 1-1/4" Flow Switch w/Stainless Steel Body And NEMA 4X Enclosure 120191. Mcdonnell & Miller 120191 Instruction Manual Features: For applications requiring a water-tight, dust-tight or a NEMA 4X...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 12.00 LBS
$1,097.95 -
114800 McDonnell & Miller FS4-3T1-3/4 - 3/4" Flow Switch
McDonnell & Miller
114800 McDonnell & Miller FS4-3T1-3/4 - 3/4" Flow Switch. McDonnell & Miller FS4 Instruction Manual Features: For starting or stopping electrically operated equipment such as signal lights, alarms, motors, automatic burners, metering...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 3.00 LBS
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114410 McDonnell & Miller FS4-3Z Flow Switch 1 NPT
McDonnell & Miller
$224.95114410 McDonnell & Miller FS4-3Z Flow Switch 1 NPT. This Item Usually Ships The Same Day!- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 2.00 LBS
$224.95 -
176295 McDonnell & Miller 751P-MT-SP-120 LWCO
McDonnell & Miller
$328.95176295 McDonnell & Miller 751P-MT-SP-120 LWCO. The Series 751P/752P probe type LWCOs provide protection against low water conditions for commercial and industrial applications. These controls are fully CSD-1 compliant and are primarily used as...- Availability:
- Please Contact Us For Lead Time!
- Weight:
- 5.00 LBS
- Manufacturer:
- Mcdonnell & Miller
- Model:
- 751P-MT-SP-120
- Part Number:
- 176295
- Application:
- Steam Boilers and Hot Water Boilers
- Connection Size:
- 3/4"
- Connection Type:
- NPT
- Max Steam Pressure:
- 15 psi
- Max Water Pressure:
- 160 psi
- Max Water Temp:
- 250*F
- Max Ambient Temp:
- 135*F
- Voltage:
- 120v, 240v
- Installation Method:
- Direct To Boiler Tappings
- Reset Type:
- Manual
- Enclosure:
- NEMA 1
- Ohms Sensitivity:
- 20,000 ohm
$328.95 -
171802 McDonnell & Miller Hi Pressure Level Control 150S-MD
McDonnell & Miller
$1,052.95171802 McDonnell & Miller Hi Pressure Level Control 150S-MD. Information: 171802 McDonnell & Miller 150S Instruction Manual Specifications For boilers of any steaming capacity Monel bellows provides corrosion resistance Snap action...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 27.00 LBS
$1,052.95 -
172702 McDonnell & Miller Hi Pressure Level Control 150S-M
McDonnell & Miller
172702 McDonnell & Miller Hi Pressure Level Control 150S-M. Information: 172702 McDonnell & Miller Instruction Manual Features and Benefits For commercial and industrial low or high pressure Boiler applications For boilers of...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 30.00 LBS
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149600 McDonnell & Miller 67-G Mechanical Low Water Cut Off
McDonnell & Miller
$624.95149600 McDonnell & Miller 67-G Mechanical Low Water Cut Off. Float Type Low Water Cut Off For Millivolt Service. Mcdonnell & Miller LWCO Series 67 Instruction Manual Mcdonnell & Miller LWCO Series 67 Submittal...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 12.00 LBS
$624.95 -
143100 McDonnell & Miller Mechanical LWCO 63M
McDonnell & Miller
$854.95142400 McDonnell & Miller Mechanical Low Water Cut Off 63. Mechanical LWCO For Steam Boilers. Information: Mcdonnell & Miller LWCO Series 63 Instruction Manual Features: For residential and commercial low pressure steam boiler...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 14.00 LBS
$854.95 -
135000 McDonnell & Miller Mechanical Water Feeder LWCO 51-2
McDonnell & Miller
$1,558.95135000 McDonnell & Miller Mechanical Water Feeder LWCO 51-2. Mcdonnell & Miller 135000 Instruction Manual Features: For low pressure steam and hot water boilers larger than 5,000 sq. ft. (465m2) capacity with cold water...- Availability:
- Please Contact Us For Lead Time!
- Weight:
- 40.00 LBS
$1,558.95 -
134900 McDonnell & Miller 51-HD Head Mechanism
McDonnell & Miller
$1,168.95134900 McDonnell & Miller 51-HD Head Mechanism for Mechanical Water Feeder. This Item Usually Ships The Same Day!- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 18.00 LBS
$1,168.95
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
