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
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
126400 McDonnell & Miller 21 Make-Up Water Feeder Model 21
McDonnell & Miller
$957.95126400 McDonnell & Miller Make-Up Water Feeder Model 21. Mcdonnell & Miller Model 21 Instruction Manual For boiler receiver tanks Direct mounting eliminates need for equalizing connections Proportional feed action Mounting Flange –...$957.95 -
173003 McDonnell & Miller 150S-HD Head Mechanism Only
McDonnell & Miller
$974.95173003 McDonnell & Miller 150S-HD Head Mechanism Only, Automatic Reset, for 150S, 157S, 158S. Please Contact Us For Lead Time!$974.95 -
127100 McDonnell & Miller 25-A-HD Head Assembly
McDonnell & Miller
$1,157.95127100 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...$1,157.95 -
123010 McDonnell & Miller AFE-1 Air Flow Switch
McDonnell & Miller
$1,097.95123010 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,...$1,097.95 -
171702 McDonnell & Miller Hi Pressure Level Control 150S
McDonnell & Miller
$997.95171702 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...$997.95 -
172806 McDonnell & Miller 150S-M Combo LWCO & Pump Controller
McDonnell & Miller
$1,074.95172806 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...$1,074.95 -
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...$979.95 -
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...$1,097.95 -
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...$1,052.95 -
172702 McDonnell & Miller Hi Pressure Level Control 150S-M
McDonnell & Miller
$1,231.95172702 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...$1,231.95 -
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!$1,168.95 -
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!$998.95 -
120175 McDonnell & Miller FS7-4SE - 1-1/4" Flow Switch
McDonnell & Miller
$1,198.95120175 McDonnell & Miller FS7-4SE - 1-1/4" Flow Switch With Stainless Steel Body And NEMA 7 & 9 Enclosure. Mcdonnell & Miller 120175 Instruction Manual Features: For hazardous environment applications requiring a NEMA 7 (Class I,...$1,198.95 -
114795 McDonnell & Miller FS5-S-1 - 1" Flow Switch
McDonnell & Miller
$1,096.95114795 McDonnell & Miller FS5-S-1 - 1" Flow Switch With Stainless Steel Body 114795. McDonnell & Miller FS5 Instruction Manual Features: In-line configuration eliminates need for a pipe tee Sizes available: 3/4" NPT, 1" NPT Materials...$1,096.95 -
129802 McDonnell & Miller LWCO 42S-N Pump Controller
McDonnell & Miller
$1,089.95129802 McDonnell & Miller LWCO 42S-N Pump Controller. Instruction Manual For residential, commercial, and industrial low and medium pressure steam boilers with a separate water column For boilers of any steaming capacity Monel bellows...$1,089.95 -
143700 McDonnell & Miller 64A Mechanical Low Water Cut Off
McDonnell & Miller
$1,064.95143700 McDonnell & Miller 64A Mechanical Low Water Cut Off. Mechanical LWCO For Steam Boilers. Mcdonnell & Miller LWCO Series 64 Instruction Manual Features: Optional manual reset is available For boilers of any steaming...$1,064.95 -
176212 McDonnell & Miller Mechanical Water Feeder 47X-2
McDonnell & Miller
$1,121.95176212 McDonnell & Miller Mechanical Water Feeder 47X-2. This Item Usually Ships The Same Day!$1,121.95 -
172807 McDonnell & Miller Hi Pressure Level Control 150S-M-MD
McDonnell & Miller
$1,038.95172807 McDonnell & Miller Hi Pressure Level Control 150S-M-MD. McDonnell & Miller 150S Instruction Manual Specifications For boilers of any steaming capacity Monel bellows provides corrosion resistance Snap action switches for high...$1,038.95 -
132700 McDonnell & Miller Water Feeder 47
McDonnell & Miller
$1,015.95132700 McDonnell & Miller Water Feeder 47. 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 fittings...$1,015.95 -
120171 McDonnell & Miller FS7-4SJ Flow Switch 1-1 4 BSTP
McDonnell & Miller
$958.95120171 McDonnell & Miller FS7-4SJ Flow Switch 1-1 4 BSTP. *Please note image is generic. Mcdonnell & Miller 120160 Instruction Manual Features: Universal design serves the widest variety of large pipe applications, including heating and...$958.95 -
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 -
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