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McDonnell & Miller

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27 products

Brass and black metal float-type low water cut-off valve with curved inlet pipe and yellow warning tag attached.

McDonnell & Miller 149400 67, Float Type Low Water Cut-off (Steam)

SKU #: MCDM67   |   MPN #: 149400
$659.60
$659.60 $0.00
MSRP: $839

Available in stock

McDonnell & Miller electronic water feeder with black casing, white label, and brass connector fittings.

McDonnell & Miller WFE 120V Uni-Match Electronic Feeder

SKU #: MCDMWFE120V   |   MPN #: WFE-120
$418.17
$418.17 $0.00
MSRP: $536

Available in stock

McDonnell & Miller RB-24EL low water cut-off with brass fitting and attached gray tubing on white background.

McDonnell & Miller RB-24EL Low Water Cut-Off

SKU #: MCDMRB24EL   |   MPN #: 144690
$186.26
$186.26 $0.00
MSRP: $232

Available in stock

Black float-type low water cut-off valve with curved metal probe and threaded connection ports for steam boiler systems.

McDonnell & Miller 149500 67-LQHU, Float Type Low Water Cut-off without quick hook-up fittings (Steam)

SKU #: MCDM67LQHU   |   MPN #: 149500
$527.95
$527.95 $0.00
MSRP: $666

Available in stock

Black cylindrical flow switch with brass threaded inlet connection and dial gauge on front panel.

McDonnell & Miller 114400 FS4-3, 1-inch General Purpose Flow Switch - Paddle Style

SKU #: MCDMFS43   |   MPN #: 114400
$245.03
$245.03 $0.00
MSRP: $309

Special Order. Expect 4-6 weeks for delivery, subject to change

Black cylindrical electronic water cut-off switch with brass fitting and probe sensor attached.

McDonnell & Miller RB-24E 144692, Electronic, 24V Low Water Cut-Off - (Water)

SKU #: MCDMRB24E   |   MPN #: 144692
$178.45
$178.45 $0.00
MSRP: $221

Available in stock

Black and gray McDonnell & Miller water feeder with brass fittings and red indicator light on front panel.

McDonnell & Miller WFE-24V, Uni-Match Universal Water Feeder (24V)

SKU #: MCDMWFE24V   |   MPN #: 169550
$418.17
$418.17 $0.00
MSRP: $536

Available in stock

Black mechanical water feeder with brass connections, adjustment lever, and control switch mounted on side.

McDonnell & Miller 47-2 132800, Mechanical Water Feeder w/ #2 Switch (LWCO Function)

SKU #: MCDM472   |   MPN #: 132800
$1,513.03
$1,513.03 $0.00
MSRP: $1,987

Available in stock

Square blue-gray gasket with central circular opening and four corner mounting holes, shown against ruler for scale.

McDonnell & Miller 37-39 313200 Blow Down Valve/Strainer Gasket

SKU #: MCDM3739   |   MPN #: 313300
$18.15
$18.15 $0.00
MSRP: $18.15

Available in stock

Brass probe assembly with white ceramic tube and threaded metal connector for PS 800/850 boiler systems.

McDonnell & Miller 354081 Probe Standard Pa-800, Use with PS 800, 850

SKU #: MCDMPA800   |   MPN #: 354081
$119.06
$119.06 $0.00
MSRP: $145

Available in stock

Brass lower quick hookup fitting with male NPT threads and gray connector nut.

McDonnell & Miller SA159-24 349500, Lower Quick Hookup Fittings for 42A, 47, 64A, 67

SKU #: MCDMSA15924   |   MPN #: 349500
$235.69
$235.69 $0.00
MSRP: $297

Available in stock

McDonnell & Miller 150-14 flat face flange head gasket, circular rubber ring with gray finish.

McDonnell & Miller 150-14 325400 Head Gasket for Flat Face Flange Head

SKU #: MCDM15014   |   MPN #: 325700
$21.34
$21.34 $0.00
MSRP: $21.34

Available in stock

Dark gray circular gasket with central hole and eight evenly spaced mounting holes around the perimeter.

McDonnell & Miller 150-14H 325500, Gasket for 150

SKU #: MCDM15014H   |   MPN #: 325600
$20.47
$20.47 $0.00
MSRP: $20.47

Available in stock

Black cylindrical level control switch with metal probe connection and white label on top.

McDonnell & Miller 309100 11 Level Control Switch

SKU #: MCDM11   |   MPN #: 309100
$322.48
$322.48 $0.00
MSRP: $417

Available in stock

Black cast iron spherical boiler feed water valve with control module mounted on top and threaded connection port.

McDonnell & Miller 171702, Model 150S

SKU #: MCDM150S   |   MPN #: 171702
$1,283.86
$1,283.86 $0.00
MSRP: $1,699

Available in stock

Black electric water feeder with red button, control panel, and two protruding electrical wires.

McDonnell & Miller 169500 Series 101-A-24v Electric Water Feeder 24v

SKU #: MCDM101A24V   |   MPN #: 169500
$906.09
$906.09 $0.00
MSRP: $1,195

Available in stock

Black cast iron float-type low water cut-off valve with cylindrical body and vertical control head mounted on top.

McDonnell & Miller 63 142400, Float Type Low Water Cut-Off (Steam or Water)

SKU #: MCDM63   |   MPN #: 142400
$877.49
$877.49 $0.00
MSRP: $1,120

Available in stock

Black electric water feeder with red button on top, control panel, and two wire leads extending from side.

McDonnell & Miller 169400 Series 101-A Electric Water Feeder 120V

SKU #: MCDM101A120V   |   MPN #: 169400
$689.46
$689.46 $0.00
MSRP: $906

Available in stock

Black cylindrical cutoff/alarm switch with mounting bracket and silver control panel.

McDonnell & Miller 110000 2 CUTOFF/ALARM SWITCH

SKU #: MCDM2   |   MPN #: 110000
$277.80
$277.80 $0.00
MSRP: $348

Available in stock

Black blow down valve with yellow warning handle and adjustment dial on top.

McDonnell & Miller 14-B 310447 Low Water Cut-Off Ball Type Blow Down Valve

SKU #: MCDM14B   |   MPN #: 310447
$207.98
$207.98 $0.00
MSRP: $267

Available in stock

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