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Flow Switch (30)
Flow Switch Part (21)
Heating Gasket (5)
Heating Part (2)
Heating Valve (1)
Low Water Cutoff (84)
Low Water Cutoff Accessory (75)
Relief Valve (24)
Water Feeder (29)
Water Feeder Part (82)

McDonnell & Miller

McDonnell & Miller
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Product Image of 158S-MD, Combination Low Water Cutoff & Pump Controller w/ 2 SPDT switches,w/ Maximum Differential
$1,411.69 each
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Product Image of S-4, Probe Spacer
$66.83 each
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Product Image of P-6-SS Teflon Coated Probe for RS Series Sensors (72")
$126.10 each
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Product Image of 21-109, Replacement Connector for 21
$41.02 each
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Product Image of 27-9, Float and Nipple replacement for 27
$228.18 each
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Product Image of 27T-70, Replacement Stud for 27
$8.73 each
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Product Image of 21-3, Valve Bracket for 21
$157.19 each
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Product Image of GSKT-FS254, Gasket for FS254
$12.52 each
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Product Image of FS4-3COV, Replacement Cover for Flow Switch
$23.87 each
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Product Image of FS7-4S, 1-1/4" Flow Switch w/ Stainless Steel Body
$1,079.16 each
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Product Image of 64-A, Float Type LWCO w/ quick hook-up fittings
$1,064.70 each
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Product Image of 157S-RB-MD, Float Type, Combo LWCO & Pump Controller w/ Water Column, w/ Maximum Differential
$2,021.01 each
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Product Image of 159S, Combination Low Water Cutoff & Pump Controller w/ 2 SPST switches
$1,742.22 each
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Product Image of FS7-4SJ, 1-1/4" BPST General Purpose Flow Switch - Paddle Style
$1,631.68 each
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Product Image of 27-W, Liquid Level Control
$3,866.63 each
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Product Image of RB-24SE-B, GuardDog Electronic, 24V Low Water Cut-Off w/ Burner Control Harness (Water) (Purple Tubing)
$157.50 each
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Product Image of 157R158S-HD, Head Replacement for Low Water Cutoff
$2,034.17 each
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Product Image of 60" G-5-SS Non-Teflon Ground Probe
$72.84 each
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Product Image of 158S-M, Combination Low Water Cutoff & Pump Controller w/ 2 SPDT switches, w/ Manual Reset
$1,406.61 each
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Product Image of FS6-W-1, 1" Flow Switch w/ NEMA 4X enclosure
$545.76 each
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Product Image of 193-B, Combo Low Water Cut-Off & Pump Controller w/ #5 Switch w/ Alternate Tappings (Steam)
$2,708.38 each
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Product Image of 193-D, Combo Low Water Cut-Off & Pump Controller w/ #5 Switch w/ Alternate Tappings (Steam)
$3,401.94 each
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Product Image of 193-B-M, Combo Low Water Cut-Off & Pump Controller w/ #5 Switch, w/ Alternate Tappings, w/ Manual Reset (Steam)
$3,014.03 each
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Product Image of 193-B-7B-M, Combo Low Water Cut-Off & Pump Controller w/ #7B Switch w/ Alternate Tappings , w/ Manual Reset (Steam)
$3,647.15 each
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Product Image of 194-A, Combo Low Water Cut-Off and Pump Controllers w/ Alternate Tappings (Steam)
$2,824.47 each
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Product Image of 569, Float Type Low Water Cut-off, 1-3/16" Insertion (Steam)
$590.00 each
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Product Image of 250-3/4-15, Relief Valve 3/4" NPT, 15 psi (1 kg/cm2)
$155.00 each
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Product Image of 250-1-36, Relief Valve 1" NPT, 36 psi (2.5 kg/cm2)
$266.60 each
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Product Image of 250-1-40, Relief Valve 1" NPT, 40 psi (2.8 kg/cm2)
$266.60 each
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Product Image of 250-1-65, Relief Valve 1" NPT, 65 psi (4.6 kg/cm2)
$251.45 each
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Product Image of 250-1-100, Relief Valve 1" NPT, 100 psi (7 kg/cm2)
$416.48 each
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Product Image of 260-1-1/2-45, Relief Valve 1-1/2" NPT, 45 psi (3.2 kg/cm2)
$960.75 each
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Product Image of 250-2-30, Relief Valve 2" NPT, 30 psi (2.1 kg/cm2)
$994.09 each
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Product Image of 250-2-40, Relief Valve 2" NPT, 40 psi (2.8 kg/cm2)
$1,276.66 each
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Product Image of Relief Valve 1" NPT, 30 psi (2.1 kg/cm2)
$122.75 each
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Product Image of AF3-122, Paddle Kit for AF3
$38.50 each
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Product Image of FS1-14, Replacement Gasket for FS1
$20.42 each
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Product Image of SA47C-101-102, Valve and Strainer for Reverse flow 47
$505.77 each
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Product Image of SA53-6, Valve Assembly for 53
$647.15 each
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Product Image of SA851S-4, Bellows Bracket Assembly for 851 & 851S
$486.21 each
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Product Image of 159-24, Brass Y Fittings for 42A, 47, 64A, 67
$126.27 each
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Product Image of 851-105, Float Rod for 851
$48.20 each
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Product Image of 851S-105, Float Rod for 851S
$54.00 each
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Product Image of FS7S-4R-4, Paddle Arm Kit
$220.00 each
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Product Image of FS7-VL-4R-4, Long Paddle Arm Kit
$265.09 each
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Product Image of SA27W-6, Valve Mechanism Assembly
$1,793.30 each
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Product Image of SWA158S, Snap Switch Assembly for 158 Water Feeder
$485.00 each
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Product Image of 150S-B-M, Mechanical Low Water Cutoff & Pump Controller w/ Manual Reset (Steam)
150S-B-M, Mechanical Low Water Cutoff & Pump Controller w/ Manual Reset (Steam)
SKU: 150S-B-M
McDonnell & Miller
SKU: 150S-B-M
$4,084.16 each
In Stock
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For over 80 years, McDonnell & Miller has been an industry leader in the engineering and manufacturing of flow switches, low water cut-offs, water feeders, etc. Trust McDonnell & Miller for everything you need to move water.