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Flow Switch (30)
Flow Switch Part (21)
Heating Gasket (5)
Heating Part (2)
Heating Valve (1)
Low Water Cutoff (82)
Low Water Cutoff Accessory (75)
Relief Valve (22)
Water Feeder (29)
Water Feeder Part (82)

McDonnell & Miller

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Product Image of 69-114, O-Ring for 69
$11.69 each
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Product Image of 247-2-M, Mechanical Water Feeder w/ #2 Switch (LWCO Function), w/ Manual Reset
247-2-M, Mechanical Water Feeder w/ #2 Switch (LWCO Function), w/ Manual Reset
SKU: 133900
McDonnell & Miller
SKU: 133900
$1,413.47 each
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Product Image of MA559 Quick Hook-Up Fittings for 67 Series
$231.00 each
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Product Image of 157S-RBP-MD, Float Type, Combo LWCO & Pump Controller w/ Water Column, w/ 2 integral conductance probes (Steam)
$3,063.78 each
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Product Image of 48" G-4-SS Non-Teflon Ground Probe
$56.34 each
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Product Image of 851-S, Make-Up Water Feeder w/ extended float & rod assembly
$1,315.30 each
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Product Image of 750P Series Replacement Electrode with 3/8" NPT Tank Connection (Model PA-750-LP)
$107.29 each
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Product Image of 7-BM Manual Reset Proportioning Switch
$2,033.66 each
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Product Image of FS7-4SJ, 1-1/4" BPST General Purpose Flow Switch - Paddle Style
$1,486.13 each
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Product Image of FS7-4SW, 1-1/4" Flow Switch w/ Stainless Steel Body, w/ NEMA 4X Enclosure
$1,354.11 each
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Product Image of FS5-S-1, 1" Flow Switch w/ Stainless Steel body
$1,478.68 each
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Product Image of 250-1-75, Relief Valve 1" NPT, 75 psi (5.3 kg/cm2)
$252.19 each
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Product Image of P-1/3-SS 4-1/2" Probe for RS Series Sensors (120/240V)
$15.18 each
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Product Image of 194-M, Combo Low Water Cut-Off and Pump Controllers w/ Manual Reset(Steam)
$2,767.64 each
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Product Image of RS-5-BR-1, High Pressure Remote Sensor (5 Levels)
$897.72 each
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Product Image of 193-A, Combo Low Water Cut-Off & Pump Controller w/ #5 Switch w/ Alternate Tappings (Steam)
$3,273.96 each
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Product Image of 193-A-7B, Combo Low Water Cut-Off & Pump Controller w/ #7B Switch w/ Alternate Tappings (Steam)
$3,424.41 each
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Product Image of 94M, Combo Low Water Cut-Off & Pump Controller w/ Manual Reset (Steam)
$2,615.97 each
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Product Image of 157S-A, Float Type, Combo LWCO & Pump Controller w/ Water Column, w/ Alternate Tappings (Steam)
$1,747.70 each
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Product Image of 551-S-HD, Head Mechanism for Make-Up Water Feeder
$1,993.60 each
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Product Image of FS4-15RP, Reinforced Stainless Steel Paddle Kit w/ 1" & 6" Paddles
$24.00 each
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Product Image of 194-A-7B, Combo Low Water Cut-Off and Pump Controllers w/ Alternate Tappings, w/ No. 7B Switch (Steam)
$3,674.80 each
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Product Image of Series 93, Low Water Cut-Off/Pump Controller - Snap Acting Switch
$2,416.44 each
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Product Image of 101-24V-48, 24V Transformer for 101A
$543.83 each
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Product Image of SA47-104, Bellows Assembly for 247
$511.28 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 159S-HD, Head Assembly for Combination Low Water Cutoff & Pump Controller w/ 2 SPST switches
$1,437.36 each
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Product Image of 60" G-5-SS Non-Teflon Ground Probe
$71.38 each
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Product Image of FS7W-43, Replacement Gasket for Flow Switch
$78.00 each
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Product Image of 150S-B-M, Mechanical Low Water Cutoff & Pump Controller w/ Manual Reset (Steam)
$4,084.16 each
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Product Image of 64-A-M, Float Type LWCO w/ Quick Hook Up, w/ Manual Reset
$931.25 each
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Product Image of 157S-P, Float Type, Combo LWCO & Pump Controller w/ Water Column w/ Snap Switch and Side Ports(Steam)
$1,831.97 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 250-2-30, Relief Valve 2" NPT, 30 psi (2.1 kg/cm2)
$974.21 each
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Product Image of AF1-21, Replacement Gasket for Air Flow Switch
$10.54 each
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Product Image of 260-1-1/2-50, Relief Valve 1-1/2 NPT, 50 psi (3.5 kg/cm2)
$959.00 each
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Product Image of AF3-122, Paddle Kit for AF3
$38.50 each
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Product Image of 250-3/4-50, Relief Valve 3/4" NPT, 50 psi (3.5 kg/cm2)
$163.10 each
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Product Image of 42S-N, Combo Low Water Cut-Off - Pump Controller (Steam) w/ gauge glass connector
$1,215.12 each
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Product Image of AF1-S-122, Stainless Steel Paddle for Air Flow Switches
$71.75 each
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Product Image of 21-3, Valve Bracket for 21
$157.19 each
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Product Image of P-6-SS Teflon Coated Probe for RS Series Sensors (72")
$123.58 each
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Product Image of 72" G-6-Ss Non-Teflon Ground Probe
$72.62 each
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Product Image of GSKT-FS254, Gasket for FS254
$12.52 each
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Product Image of 469, Float Type Low Water Cut-off, 1-3/16" Insertion (Steam)
$580.00 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 157S-M-MD, Float Type, Combo LWCO & Pump Controller w/ Water Column, Manual Reset & Maximum differential (Steam)
$1,803.34 each
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Product Image of FS7-28S, Replacement Paddle for FS7-F4
$46.33 each
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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.