McDonnell & Miller
-
114641 McDonnell & Miller FS4-3S 1" Flow Switch
McDonnell & Miller
$646.95McDonnell & Miller FS4-3S 1" Flow Switch w/Stainless Steel Body Monel Bellows 114641. McDonnell & Miller FS4 Brochure McDonnell & Miller FS4 Instruction Manual Universal design serves the widest variety of applications. For starting or...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 2.00 LBS
$646.95 -
126800 McDonnell & Miller 25-A Make-Up Water Feeder
McDonnell & Miller
$1,387.95126800 McDonnell & Miller Make-Up Water Feeder Model 25-A. McDonnell & Miller Model 21 Water Feeder Instruction Manual Features: For boiler receiver tanks Float operated Proportional feed action Soft seat provides positive seal Seal...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 42.00 LBS
$1,387.95 -
123200 McDonnell & Miller AF2 Air Flow Switch Model AF2
McDonnell & Miller
123200 McDonnell & Miller Air Flow Switch Model AF2. McDonnell & Miller AF1 Flow Switch Instruction Manual For low velocity applications: Paddle fits 8" (203mm) minimum duct size Two electrical knock-outs allow connection from either...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 2.00 LBS
-
132800 McDonnell & Miller Water Feeder LWCO 47-2
McDonnell & Miller
$1,448.95132800 McDonnell & Miller Water Feeder LWCO 47-2. 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 hook-up...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 30.00 LBS
$1,448.95 -
115000 McDonnell & Miller FS4-3T3-3/4 - 3/4" Flow Switch
McDonnell & Miller
McDonnell & Miller FS4-3T3-3/4 - 3/4" Flow Switch With NPT Body Low Flow Rate 115000. McDonnell & Miller FS4 Instruction Manual Features: For starting or stopping electrically operated equipment such as signal lights, alarms, motors,...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 3.00 LBS
-
149400 McDonnell & Miller 67 Mechanical Low Water Cut Off
McDonnell & Miller
$596.95149400 McDonnell & Miller 67 Mechanical Low Water Cut Off. Mcdonnell & Miller LWCO Series 67 Instruction Manual Mcdonnell & Miller LWCO Series 67 Submittal Sheet Features: For boilers of any steaming capacity Residential and...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 20.00 LBS
$596.95 -
142400 McDonnell & Miller Mechanical LWCO 63
McDonnell & Miller
$1,124.95142400 McDonnell & Miller Mechanical Low Water Cut Off 63. Mechanical For Steam Boilers. Mcdonnell & Miller LWCO Series 63 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
$1,124.95 -
144706 McDonnell & Miller FPC 1000-U LWCO W/Extended Barrel Probe U
McDonnell & Miller
$354.95144706 McDonnell & Miller FPC 1000-U LWCO W/Extended Barrel Probe U. *Please note image is generic. This Item Usually Ships The Same Day!- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 3.00 LBS
$354.95 -
171702 McDonnell & Miller Hi Pressure Level Control 150S
McDonnell & Miller
$1,196.95171702 McDonnell & Miller Hi Pressure Level Control 150S. 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:
- 27.00 LBS
$1,196.95 -
144726 McDonnell & Miller RB-24SE-L Low Water Cut Off
McDonnell & Miller
$159.95144726 McDonnell & Miller RB-24SE-L Low Water Cut Off. This Item Usually Ships The Same Day!- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 2.00 LBS
$159.95 -
115400 McDonnell & Miller FS6-3/4 - 3/4" Flow Switch
McDonnell & Miller
$569.95115400 McDonnell & Miller FS6-3/4 - 3/4" Flow Switch-High Sensitivity. 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:
- 4.00 LBS
$569.95 -
114550 McDonnell & Miller FS4-3D 1" Flow Switch
McDonnell & Miller
$374.95McDonnell & Miller FS4-3D 1" Flow Switch 4-3 W/2 SPDT Switches 114550. McDonnell & Miller FS4 Brochure McDonnell & Miller FS4 Instruction Manual Universal design serves the widest variety of applications. For starting or stopping...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 3.00 LBS
$374.95 -
127100 McDonnell & Miller 25-A-HD Head Assembly
McDonnell & Miller
$1,274.95127100 McDonnell & Miller 25-A-HD Head Assembly. Features: For boiler receiver tanks Float operated Proportional feed action Soft seat provides positive seal Seal between float chamber and valve chamber is not a positive seal Maximum water...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 20.00 LBS
$1,274.95 -
120160 McDonnell & Miller FS7-4S - 1-1/4" Flow Switch
McDonnell & Miller
$894.95120160 McDonnell & Miller FS7-4S - 1-1/4" Flow Switch With Stainless Steel Body 120160. Mcdonnell & Miller 120160 Instruction Manual Features: Universal design serves the widest variety of large pipe applications, including heating and...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 5.00 LBS
$894.95 -
140100 McDonnell & Miller Mechanical Low Water Cut Off 61
McDonnell & Miller
$648.95140100 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
$648.95 -
181905LF McDonnell & Miller Relief Valve 250-3/4-60
McDonnell & Miller
$324.95181905LF McDonnell & Miller Relief Valve 250-3/4-60. 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...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 3.00 LBS
$324.95 -
123010 McDonnell & Miller AFE-1 Air Flow Switch
McDonnell & Miller
123010 McDonnell & Miller Air Flow Switch Model AFE-1 Hazardous Environment Applications. Information: McDonnell & Miller AFE-1 Instruction Manual For industrial hazardous environment applications requiring a NEMA 7 (Class I, Division I,...- Availability:
- This Item Usually Ships The Same Day!
- Weight:
- 7.00 LBS
-
129302 McDonnell & Miller 42S Pump Controller LWCO
McDonnell & Miller
$1,064.95129302 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
$1,064.95 -
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
122800 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
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
