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McDonnell & Miller 150S-HD Head MechanismVendor MCDONNELL & MILLERSKU: 150S-HDProduct DescriptionEnhance your HVAC system with the McDonnell & Miller 150S-HD Head Mechanism, designed to optimize control and efficiency. This product is a key component for professional HVAC systems, ensuring reliable performance and durability. Integrated snap switch & gasket for secure installation. Direct replacement...
- $937.80
- $937.80
$1,099.65- Unit price
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MCDONNELL & MILLER 150S-M-HD Head Mechanism With Manual Reset Replacement 172809Vendor MCDONNELL & MILLERSKU: 150S-M-HDProduct DescriptionThe MCDONNELL & MILLER 150S-M-HD Head Mechanism features a manual reset function, tailored for robust HVAC applications. This unit is designed as a direct replacement for model 150-M-HD, previously known as 173203. Manual reset design enhances user control and safety. Constructed for durability...
- $937.80
- $937.80
$939.97- Unit price
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Xylem-McDonnell & Miller FS251 General Purpose Flow SwitchVendor MCDONNELL & MILLERSKU: FS251Product DescriptionThe Xylem-McDonnell & Miller FS251 General Purpose Flow Switch is designed to monitor and control fluid flow in various industrial applications. Built with durability in mind, this flow switch ensures reliable performance even in challenging environments. Compact and rugged design Adjustable flow rate...
- $186.76
- $186.76
$248.36- Unit price
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McDonnell & Miller 150S Pump Controller and H.P. LwcoVendor MCDONNELL & MILLERSKU: 150SProduct DescriptionThe McDonnell & Miller 150S Pump Controller and H.P. Lwco is a vital component for your HVAC systems. Known for its reliability and durability, this pump controller ensures optimal performance and longevity. Suitable for water or steam Equipped with snap switch #171702 Rated...
- $1,009.95
- $1,009.95
$2,192.23- Unit price
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Mcdonnell & Miller FS4-3 Flow Switch 1 in SPDTVendor MCDONNELL & MILLERSKU: FS4-3Product Description The McDonnell & Miller FS4-3 Flow Switch is designed for various industrial applications. This general-purpose liquid flow switch features a single pole double throw (SPDT) contact configuration and a 1-inch NPT connection for ease of installation. The FS4-3 ensures reliable flow detection...
- $199.66
- $199.66
$346.07- Unit price
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MCDONNELL & MILLER 61 Float Type Low Water Cut-Off for Steam 140100 Mechanical 120/240 VACVendor MCDONNELL & MILLERSKU: 61Product DescriptionThe McDonnell & Miller model 61 is a reliable mechanical low water cut-off for boilers. Designed to enhance system safety and efficiency, it effectively monitors water levels, shutting down the boiler when water levels drop too low. This preventative measure safeguards against boiler...
- $555.47
- $555.47
$1,127.94- Unit price
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MCDONNELL & MILLER 21 Makeup Feeder 3/4in Includes GasketVendor MCDONNELL & MILLERSKU: 21Product DescriptionThe MCDONNELL & MILLER 21 Makeup Feeder, featuring a 3/4 inch connection, is a high-efficiency solution for maintaining water levels in boilers. Includes a convenient gasket for easy installation. Designed for durability and long-term performance. Ideal for both residential and commercial applications. Product...
- $844.03
- $844.03
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Xylem-McDonnell & Miller 5-M Switch Manual Reset 8 inches 7.5 inches 5.85 inchesVendor MCDONNELL & MILLERSKU: 5MProduct DescriptionThe Xylem-McDonnell & Miller 5-M Manual Reset Switch is an essential component designed for reliable performance in industrial and commercial water systems. The switch ensures safe operation and maintenance of pumps and other equipment. Manual reset feature for easy troubleshooting Rugged and durable...
- $953.63
- $953.63
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Mcdonnell & Miller SA150-11 Float & Rod AssemblyVendor MCDONNELL & MILLERSKU: SA150-11Product DescriptionThe Mcdonnell & Miller SA150-11 Float & Rod Assembly is designed for use with McDonnell & Miller 150 and 157 series liquid level controls. This assembly consists of a durable plastic float and a stainless steel rod. The float provides a visual indication...
- $319.62
- $319.62
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Mcdonnell & Miller 221 Make Up Water Feeder 126600Vendor MCDONNELL & MILLERSKU: 221Product DescriptionThe McDonnell & Miller 221 make-up water feeder is a crucial part for your heating system, ensuring consistent water supply. This model number 221 feeder offers reliable performance for maintaining the water levels in your HVAC system. Ensures consistent water supply Maintains proper...
- $844.03
- $844.03
$857.97- Unit price
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Mcdonnell & Miller FS7-4W 1-1/4 MNPT Heavy-duty Flow Switch NEMA 4XVendor MCDONNELL & MILLERSKU: FS7-4WProduct DescriptionThe Mcdonnell & Miller FS7-4W flow switch, with MPN FS7-4W, is designed for heavy-duty industrial applications. It ensures reliable operation and monitoring of fluid flow in plumbing, HVAC, and industrial systems. Industrial/Heavy-duty switch Minimum flow rate: 4.8 GPM Maximum flow rate: 7.7 GPM...
- $666.43
- $666.43
$1,203.77- Unit price
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CAI - MCDONNELL & MILLER 750-T-120 Probe Type Lwco With Auto Reset And Test SwitchVendor MCDONNELL & MILLERSKU: 750-T-120Product DescriptionThe CAI - MCDONNELL & MILLER 750-T-120 is a probe type low water cut-off switch designed for use in industrial boilers and water systems. This unit features an automatic reset function and a test switch for simplified operation and maintenance. The probe must...
- $225.04
- $225.04
$500.94- Unit price
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Mcdonnell & Miller SA67-2 Float & Bellows Assembly For 61 67 69 70 344200Vendor MCDONNELL & MILLERSKU: SA67-2Product DescriptionThe Mcdonnell & Miller SA67-2 Float & Bellows Assembly is crucial for maintaining optimal performance in HVAC systems. Designed by Mcdonnell & Miller, this component integrates seamlessly with compatible equipment, ensuring reliable operation. Precision-engineered for accurate level detection Durable construction for longevity Compatible...
- $199.66
- $199.66
$206.97- Unit price
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Mcdonnell & Miller FS5-3/4 Flow Switch Low Flow Rate Sensitivity 3/4 114760Vendor MCDONNELL & MILLERSKU: FS5-3/4Product DescriptionThe Mcdonnell & Miller FS5-3/4 is a reliable liquid flow switch designed for various industrial applications. This flow switch is ideal for monitoring fluid flow in pipelines and ensuring system efficiency. Monitors fluid flow accurately Suitable for various industrial applications Durable brass construction...
- $325.50
- $325.50
$605.98- Unit price
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Xylem-McDonnell FS1 | 1/2 SPDT Flow Switch | #113200Vendor MCDONNELL & MILLERSKU: FS1Product DescriptionThe Xylem-McDonnell & Miller FS-1 is a 1/2 SPDT flow switch designed for industrial piping systems. It monitors fluid flow with precision and controls fluid operations effectively. The robust construction enables the FS-1 to function in tough conditions, making it suitable for various...
- $318.45
- $318.45
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McDonnell & Miller 47-2 Combination Mechanical Water Feeder, LwcoVendor MCDONNELL & MILLERSKU: 47-2Product Description The McDonnell & Miller 47-2 Combination Mechanical Water Feeder and Low Water Cut-Off (Lwco) is ideal for steam and hot water boilers. Designed by McDonnell & Miller, this unit ensures continuous maintenance of a minimum safe water level independently from electrical services....
- $1,222.76
- $1,222.76
$1,241.98- Unit price
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ITT McDonnell Miller FS254 Flow Switch Nema-4 1 Inch NPT SPDTVendor MCDONNELL & MILLERSKU: FS254Product DescriptionThe ITT McDonnell Miller FS254 is a highly reliable flow switch designed for industrial applications. This flow switch comes equipped with a variety of stainless steel paddles for versatile application across different flow rates. Durable and designed for industrial use SPDT (Single Pole...
- $248.00
- $248.00
$270.97- Unit price
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McDonnell & Miller 37-39 Strainer Or Blow Off GasketVendor MCDONNELL & MILLERSKU: 37-39Product DescriptionThe McDonnell & Miller 37-39 Strainer Or Blow Off Gasket is a reliable solution designed to maintain the integrity of your piping systems. This essential component is expertly crafted to provide a secure seal between flanges, preventing leaks and ensuring efficient operation. Designed...
- $21.99
- $21.99
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Mcdonnell & Miller SA259-24 Upper Quick Hook Up (for 47)Vendor MCDONNELL & MILLERSKU: SA259-24Product DescriptionThe Mcdonnell & Miller SA259-24 Upper Quick Hook Up is an essential component for industrial setups. This hook up is designed to provide a secure and efficient connection for optimal performance and safety. Compatible with the 47 series. Secure and efficient connection High-quality...
- $170.51
- $170.51
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MCDONNELL & MILLER 351800 SA259-24 Upper Quick Hook-Up FittingVendor MCDONNELL & MILLERSKU: 351800Product DescriptionThe MCDONNELL & MILLER 351800 SA259-24 is designed for efficient and reliable hook-up with model numbers 42A, 47, 47-2, and 64A controls. This upper quick hook-up fitting ensures direct installation to gauge glass tappings on boilers, facilitating seamless gauge glass integration. Streamlines installation...
- $186.96
- $186.96
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About MCDONNELL & MILLER
McDonnell & Miller Low Water cut-offs are specially designed to protect steam and hot water boilers from the hazards of a low water condition. In operation they will interrupt the electrical current to the firing device, if the water in the system drops below the boiler manufacturer’s minimum safe water level. Our low water cut-offs also provide an additional circuit for a low water alarm, should you desire to install one, for additional protection.
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