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

McDonnell & Miller

McDonnell & Miller
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Product Image of FS251, General purpose flow switch w/ NEMA 1 enclosure
$202.30 each
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Product Image of FPC-1000-P, boilerwize Electronic Low Water Cut-Off w/ Probe, 24V/120V, Auto/Manual (Steam/Water)
$287.00 each
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Product Image of RB-122-E, GuardDog Electronic, 120V Low Water Cut-Off (Water)
$151.06 each
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Product Image of FS4-3, 1" General Purpose Flow Switch - Paddle Style
$309.00 each
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Product Image of 150S-HD, Head Assembly for 150 series (Snap Switch)
$1,103.90 each
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Product Image of FS254, General purpose flow switch w/ NEMA 4 enclosure (Replaces FS8-W)
$296.99 each
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Product Image of CO-12 Head Gasket for 42, 61, 63, 64, 65
$12.80 each
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Product Image of 150-14H, Gasket for 150
$13.00 each
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Product Image of RB-24SE, GuardDog Electronic, 24V Low Water Cut-Off (Water)
$150.50 each
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Product Image of WFE-24V, Uni-Match Universal Water Feeder (24V)
$375.20 each
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Product Image of 67, Float Type Low Water Cut-off (Steam)
$663.21 each
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Product Image of FPC-1000, boilerwize Electronic Low Water Cut-Off w/o Probe, 24V/120V, Auto/Manual (Steam/Water)
$205.54 each
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Product Image of PA-800, Probe Assembly for 750, 750-MT-120, PS800, PS801, PS850, PS851
$102.21 each
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Product Image of FS8-W 1" SPDT Liquid Flow Switch (NEMA-4X)
$253.39 each
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Product Image of 67-12, Sylphon Gasket for 67 & 80
$7.93 each
BOX UP & SAVE 2%
$77.40 box of 10
$7.74 each
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Product Image of 47-2, Mechanical Water Feeder w/ #2 Switch (LWCO Function)
$1,987.00 each
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Product Image of 14-B, Blow Down Valve-Ball Type for 47,247,67,70B Water Feeders
$154.12 each
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Product Image of 150S, Float Type, Combo LWCO & Pump Controller - (Steam)
$999.00 each
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Product Image of SA101-38, Strainer Basket Assembly 47, 51, 101A
$85.40 each
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Product Image of 101A-120V, 120V Electric Water Feeder
$577.54 each
In Stock
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Product Image of 750-HW-MT-120, GuardDog Electronic Reset High Water Cutoff (120V)
$225.10 each
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Product Image of 150S-M-HD, Head Replacement for Float Type, Combo LWCO & Pump Controller, w/ Manual Reset (Steam)
$1,047.66 each
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Product Image of RS-1-BR-1, Single Level Remote Sensor
$253.78 each
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Product Image of GuardDog Electronic, 24V Low Water Cut-Off (Water)
$153.14 each
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Product Image of FPC-1000-U, boilerwize Electronic Low Water Cut-Off w/ Extended Barrel Probe, 24V/120V, Auto/Manual (Steam/Water)
$297.50 each
In Stock
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Product Image of 69, Float Type Low Water Cut-off, 4-1/8" Insertion (Steam)
$416.70 each
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Product Image of 6667, Insert for Series 67 Low Water Cut-Off
$422.23 each
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Product Image of FS4-15SS, Stainless Steel Paddle Kit includes a 1", 2", 3", & 6" Paddle
$27.88 each
In Stock
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Product Image of FS5-3/4, 3/4" Flow Switch
$310.42 each
In Stock
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Product Image of 64-HD, Head Assembly for Series 64 Low Water Cut-Off
$538.26 each
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Product Image of CTRD-101, Cartridge and Strainer Kit, Model CTRD-101
$265.83 each
In Stock
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Product Image of F-26, M35 Gasket for 221, 25A, 51, 53, 3155
$20.18 each
In Stock
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Product Image of 63, Float Type Low Water Cut-Off  (Steam or Water)
$710.06 each
In Stock
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Product Image of WFE-120V, Uni-Match Universal Water Feeder (120V)
$375.20 each
In Stock
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Product Image of 64, Float Type Low Water Cut-Off - (Steam or Water)
$598.04 each
In Stock
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Product Image of 51-2, Mechanical Water Feeder w/ #2 Switch (LWCO Function)
$1,517.71 each
In Stock
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Product Image of 37-26, Head Gasket for 47
$14.71 each
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Product Image of 2M, Cutoff switch w/ Manual Reset for Mcdonnell & Miller 47-2, 51-2, 51S2, 63, and 247-2
$261.65 each
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Product Image of CTRD-51, Cartridge/Strainer Kit for 51,851 Water Feeder
$261.75 each
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Product Image of SA66-35 Upper Tube Assembly for 67 Series
$127.40 each
In Stock
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Product Image of 157S, Float Type, Combo LWCO & Pump Controller w/ Water Column (Steam)
$1,740.00 each
In Stock
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Product Image of 67-G, 67 Float Type Low Water Cut-off for millivolt service  (Steam)
$540.13 each
In Stock
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Product Image of 37-39, Strainer or Blow Off Gasket for 47,53,67,70
$16.38 each
In Stock
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Product Image of 63M, Float Type LWCO w/ Manual Reset  (Steam or Water Boiler)
$779.34 each
In Stock
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Product Image of 63-M-HD, Head Replacement for LWCO w/ Manual Reset
$741.55 each
In Stock
Get 24 by Wed, Sep 2
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Product Image of SA67-2, Float & Bellow Assembly
$215.30 each
In Stock
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Product Image of 61, Float Type Low Water Cut-Off (Steam)
$612.46 each
In Stock
Get 9 by Tomorrow, Sep 1
In Stock
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Product Image of FS5-1, 1" Flow Switch
$362.60 each
Out of Stock
Get it by Wed, Sep 16 - Wed, Sep 23
Out of Stock
Get it by Wed, Sep 16 - Wed, Sep 23
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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.