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McDonnell Miller, a trusted name in boiler controls and flow switches, offers a comprehensive collection of products designed for efficiency and reliability. Explore our selection and find the perfect fit for your needs.
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![Xylem-McDonnell & Miller FS8-W 1"NEMA4X,160#,SPDT #120601 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/00347889_medium.jpg?v=1718289387)
FS8-W | 1"NEMA4X, 160#, SPDT #120601 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: FS8-W
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221 | 21 W/ 8.5" BOLT CIRC. #126600 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: 221
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![Xylem-McDonnell & Miller 751P-MT-U-120 LWCO-120V W/EXT PROBE 176214 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_742e9509-1589-450e-b3d1-d3e61db6a84b_medium.png?v=1718208836)
751P-MT-U-120 | LWCO-120V W/EXT PROBE 176214 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: 751P-MT-U-120
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![Xylem-McDonnell & Miller 349500 SA159-24,LOWER QWIK HOOKUP ASM | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_70b82df2-c21a-4cb9-94e5-77b0fcfc24b9_medium.png?v=1718061832)
349500 | SA159-24, LOWER QWIK HOOKUP ASM | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: 349500
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![Xylem-McDonnell & Miller 313600 37A-130, FLOAT FOR 847 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_95e626dc-6044-4f8d-a533-ae489acf66fd_medium.png?v=1718101278)
313600 | 37A-130, FLOAT FOR 847 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: 313600
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![Xylem-McDonnell & Miller AF3-D AF3 W/ 2 SPDT SWITCHES #123450 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_98e680f5-2468-4c11-8a85-71f1b0defd68_medium.png?v=1718131986)
AF3-D | AF3 W/ 2 SPDT SWITCHES #123450 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: AF3-D
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![Xylem-McDonnell & Miller 311200 21-30, REPLACEMENT FLOAT | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_7983ba46-7a0a-4d7d-8f42-eb413b2b9c19_medium.png?v=1718196570)
311200 | 21-30, REPLACEMENT FLOAT | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: 311200
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![Xylem-McDonnell & Miller 63-B 63 W/ EXTRA TAPPING 142700 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_dd4d5466-f6f3-4a23-8fae-253cf4810ef5_medium.png?v=1718070466)
63-B | 63 W/ EXTRA TAPPING 142700 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: 63-B
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![Xylem-McDonnell & Miller PSE-801-U-120 LWCO 120V (153828) | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_8ae61705-181d-46a8-9db4-e14d35acc533_medium.png?v=1718101311)
PSE-801-U-120 | LWCO 120V (153828) | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: PSE-801-U-120
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![Xylem-McDonnell & Miller PFC-1-G-R REV.ACT.3/15#PNEUM CTRL,180801 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_8c6c845a-9621-4e9d-9d4c-e942a36cd3da_medium.png?v=1718299422)
PFC-1-G-R | REV.ACT.3/15#PNEUM CTRL, 180801 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: PFC-1-G-R
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![Xylem-McDonnell & Miller PSE-802-M-U-24 24V M/R W-EXT PROBE (153604) | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_b4ab9d40-b399-4b06-b689-23df37cc277a_medium.png?v=1718056228)
PSE-802-M-U-24 | 24V M/R W-EXT PROBE (153604) | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: PSE-802-M-U-24
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![Xylem-McDonnell & Miller 94-HDLS 94 HD.MECH,LESS SWITCH #165302 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/00338475_e524f0fb-1e8a-4b81-9399-099f34be1913_medium.jpg?v=1718242940)
94-HDLS | 94 HD.MECH, LESS SWITCH #165302 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: 94-HDLS
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![Xylem-McDonnell & Miller 310472 VALVE ASSEM. FOR PFC-1 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_9fb49a6a-ce7b-4ff6-9ae9-106972ffcdb4_medium.png?v=1718101276)
310472 | VALVE ASSEM. FOR PFC-1 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: 310472
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![Xylem-McDonnell & Miller FS251 GEN PURPOSE 1"FLW SW (120611) | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/00343093_medium.jpg?v=1718135987)
FS251 | GEN PURPOSE 1"FLW SW (120611) | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: FS251
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![Xylem-McDonnell & Miller 53-2 53w/#2 CUTOFF SW. #137100 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_9003feb0-e2cf-4b0e-bc9e-4f6b3bede227_medium.png?v=1718030868)
53-2 | 53w/#2 CUTOFF SW. #137100 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: 53-2
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![Xylem-McDonnell & Miller FS254 GEN PURP FLOW SW NEMA4-120610 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/00317969_medium.jpg?v=1718213794)
FS254 | GEN PURP FLOW SW NEMA4-120610 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: FS254
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![Xylem-McDonnell & Miller PSE-801-M-U-120 120V M/R W/EXT PROBE (153603) | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_1e00749b-7f4c-4409-b2d9-69306bd5634e_medium.png?v=1720037024)
PSE-801-M-U-120 | 120V M/R W/EXT PROBE (153603) | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: PSE-801-M-U-120
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![Xylem-McDonnell & Miller RS-3-BR-1 3 LEVEL SENSOR,PCL/PCH,#179526 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_3dc47621-7133-4894-9e15-987f60360ea7_medium.png?v=1718141283)
RS-3-BR-1 | 3 LEVEL SENSOR, PCL/PCH, #179526 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: RS-3-BR-1
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![Xylem-McDonnell & Miller RS-2-BR-1 2 LEVEL SENSOR PCL/PCH#179525 | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_79e82490-467d-44c5-9128-86435431bbf6_medium.png?v=1720192698)
RS-2-BR-1 | 2 LEVEL SENSOR PCL/PCH#179525 | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: RS-2-BR-1
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![Xylem-McDonnell & Miller PSE-801-M-120 120V M/R W-STD PROBE (153601) | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_48fbdeab-0580-4358-a290-e05374a82eaa_medium.png?v=1718217039)
PSE-801-M-120 | 120V M/R W-STD PROBE (153601) | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: PSE-801-M-120
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![Xylem-McDonnell & Miller PSE-802-M-24 24V M/R W/STD PROBE (153602) | Midwest Supply Us](http://midwestsupplyus.com/cdn/shop/files/mcdonnell-and-miller-a-xylem-brand-logo-vector_3b28b44f-76b4-43bd-afca-ead7b25a81b0_medium.png?v=1713222782)
PSE-802-M-24 | 24V M/R W/STD PROBE (153602) | Xylem-McDonnell & Miller
Brand: Xylem-McDonnell & Miller
SKU: PSE-802-M-24
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