Boiler Controls

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2,800+ Products In Stock ā€” Ships Today

Boiler Controls, Low Water Cutoffs & Steam Traps for
Commercial & Industrial Heating Systems

Shop 2,800+ boiler controls including low water cutoffs, level controls, water feeders, pump controllers, steam traps, and boiler replacement parts. We stock McDonnell & Miller, Hydrolevel, Hoffman Specialty, and Warrick-Gems ā€” authorized distributor with free same-day shipping from Memphis, TN. Stocking current and legacy models since 1967.

Authorized distributor: McDonnell & Miller Hydrolevel Hoffman Specialty Warrick-Gems
Talk to an Expert Call (901) 458-2000
Authorized Distributor Free Same-Day Shipping Legacy & Current Models Stocked Genuine OEM Parts Only
Safety FirstLWCO & safety controls that protect steam & hot water boilers
2,800+ ProductsDeepest boiler controls inventory in the mid-South
Legacy Parts StockedSeries 63, 64, 67, 150, 157 & hard-to-find replacements
Same-Day ShippingOrders by 2 PM CT ship same day ā€” always free

Boiler Control Brands We Stock

We are an authorized distributor for all four major boiler control brands ā€” stocked deep on both current and legacy models. Find your brand below or call our team if you need help finding the right part.

McDonnell & Miller
Low Water Cutoffs, Pump Controllers & Water Feeders

McDonnell & Miller (a Xylem brand) is the most trusted name in boiler safety controls. We stock the full LWCO line including the Series 150S, 157S, 67, 64, 63, 42, 93, 193, and 194 for both steam and hot water boilers. Also stocking M&M water feeders, combination controls, pump controllers, and flow switches ā€” plus replacement gaskets, floats, and repair parts for legacy models.

Series 150S LWCOSeries 157SSeries 67 & 64Water FeedersPump ControllersRepair Parts
Hydrolevel
Electronic Low Water Cutoffs & Boiler Safety Controls

Hydrolevel electronic low water cutoffs use probe-type conductance sensing with no moving parts ā€” making them a popular upgrade over float-type LWCO on commercial steam and hot water boilers. We stock the CG400, HydroStat 3000, VXT series, and Hydrolevel combination controls for both new installations and retrofit applications.

Hydrolevel controls meet ASME CSD-1 requirements and are frequently specified for commercial boiler room upgrades where reliability and reduced maintenance are priorities.

CG400HydroStat 3000VXT SeriesElectronic LWCOASME CSD-1
Hoffman Specialty
Steam Traps, Air Vents & Boiler Accessories ā€” 1,400+ Products

Hoffman Specialty is our largest boiler controls category with 1,400+ products. Their line covers float & thermostatic steam traps (F&T), inverted bucket traps, thermodynamic traps, radiator air vents, main air vents, condensate pumps, and a comprehensive range of boiler room accessories and fittings.

Whether maintaining a residential steam boiler or a large commercial steam distribution system, Hoffman has the components. We stock both current catalog and hard-to-find legacy Hoffman parts.

F&T Steam TrapsInverted BucketRadiator Air VentsMain Air VentsCondensate Pumps
Warrick-Gems
Conductance Level Controls & Boiler Feedwater Sensing

Warrick-Gems conductance-type level controls are widely used in boiler feedwater systems, condensate receivers, and deaerators. Their Series 16, 26, DFC dual-function controls, and relay panels provide precise high and low-level switching for pump control and low-water cutoff applications.

Warrick controls are a common OEM fit on commercial boiler feedwater packages and are frequently replaced on aging systems ā€” we keep replacement relays, probes, and complete assemblies in stock.

Series 16 & 26DFC Dual FunctionRelay PanelsFeedwater SystemsReplacement Probes

Boiler Control Types We Stock

From low water cutoffs to steam traps ā€” we cover every component in the boiler room. Not sure what you need? Call our team ā€” we've been specifying boiler room parts since 1967.

Low Water Cutoffs

Float-type and electronic LWCO for steam and hot water boilers ā€” manual and automatic reset. Series 63, 64, 67, 150S, 157S and more.

Water Feeders

Float-operated water feeders that automatically maintain boiler water level. Series 47, 51, 53, 101-A, 247, and combination feeder/cutoff units.

Pump Controllers

Boiler feedwater pump controllers with float or probe-type level sensing for automatic pump start/stop. M&M Series 193 and 194.

Steam Traps

Float & thermostatic (F&T), inverted bucket, thermodynamic, and balanced pressure steam traps for steam heating distribution systems.

Air Vents & Radiator Vents

Radiator air vents, main line vents, and thermostatic air eliminators for one-pipe and two-pipe steam heating systems.

Conductance Level Controls

Probe-type electronic level sensing for feedwater tanks, condensate receivers, deaerators, and cooling towers. Warrick Series 16, 26, DFC.

Popular Models & Series

View all 2,800+ ā†’
M&M 150S / 157SLWCO & Pump Controller M&M Series 67Float LWCO ā€” Millivolt M&M Series 64Mechanical LWCO ā€” Steam M&M Series 193 / 194Pump Controllers M&M Water FeedersSeries 47, 51, 53, 101-A Hydrolevel CG400Electronic LWCO HydroStat 3000Electronic Boiler Control Hoffman F&T TrapsFloat & Thermostatic Hoffman Air VentsRadiator & Main Line Warrick Series 16Conductance Control Warrick DFC SeriesDual Function Level M&M 114400FS4-3 Flow Switch

Boiler Controls: Essential Components for Efficient Heating

Boiler controls play a pivotal role in ensuring the efficiency and safety of your heating systems. These crucial components are designed to regulate temperature, manage pressure, and monitor system performance, enhancing the functionality of your boiler. In our extensive range of boiler controls, youā€™ll find innovative solutions that cater to both residential and commercial heating needs.

Why Choose Our Boiler Controls?

  • Efficiency: Our boiler controls are engineered to optimize energy usage, helping you save on utility bills while maintaining a comfortable environment.
  • Reliability: With top-rated products like 324100 and 101A-120V, you can trust that your heating system will operate smoothly, reducing downtime.
  • Safety: Safety is paramount in heating systems. Controls such as the 144704 ensure critical safety measures are in place to prevent overheating or system failures.
  • Easy Integration: Designed to work with a variety of boiler types, our controls, including 169500 and 150-1, integrate seamlessly into existing systems.
  • Advanced Features: Options like the 171610 provide advanced functionalities such as digital displays and programmable settings for enhanced user control.

Explore our complete selection of boiler control products, including 309100, 310447, and 150S-B, to find the right fit for your heating requirements. Ensure that your heating solution is efficient and reliable with our expert-selected boiler controls.

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Need help finding the right boiler control?

Our team has been specifying boiler room parts since 1967. Orders by 2 PM CT ship same day ā€” free.

Talk to an Expert Call (901) 458-2000

Boiler Controls ā€” Frequently Asked Questions

Common questions about boiler controls, low water cutoffs, steam traps, and replacement parts. Need a specific answer? Contact our team or call (901) 458-2000.

What is a low water cutoff (LWCO) and why does my boiler need one?

A low water cutoff (LWCO) monitors the water level in a boiler and shuts off the burner if water drops below a safe minimum level. Without sufficient water a boiler can overheat and suffer catastrophic damage. LWCOs are required by code on virtually all steam and hot water boilers. Common types include float-type LWCOs like the McDonnell & Miller 150S and 157S, and electronic probe-type LWCOs like the Hydrolevel CG400 and HydroStat 3000.

What is the difference between the McDonnell & Miller 150S and 157S?

The 150S is a straight low water cutoff ā€” it monitors water level and shuts off the burner on low water. The 157S adds pump control functionality, combining a low water cutoff with a pump controller that automatically starts and stops a feedwater pump to maintain the correct boiler water level. The 157S is the right choice when you need both functions in one unit.

What is the difference between a float-type and electronic low water cutoff?

Float-type LWCOs like the McDonnell & Miller 150S use a mechanical float inside a chamber connected to the boiler ā€” as water level drops, the float drops and opens a switch to shut off the burner. Electronic probe-type LWCOs like the Hydrolevel CG400 use conductance sensing probes with no moving parts, making them less susceptible to scale buildup and mechanical failure. Electronic LWCOs are increasingly specified on commercial boilers where reliability and reduced maintenance are priorities. Both types meet ASME CSD-1 requirements.

What types of steam traps does Memphis Control Center stock?

We stock the full Hoffman Specialty steam trap line ā€” 1,400+ products. We carry float & thermostatic (F&T) steam traps, inverted bucket traps, thermodynamic traps, balanced pressure traps, and thermostatic steam traps for residential and commercial steam heating systems. We also stock Hoffman radiator air vents, main line vents, and condensate pumps.

Do you stock legacy and discontinued McDonnell & Miller parts?

Yes. Memphis Control Center has stocked McDonnell & Miller controls since 1967 and maintains inventory on both current and legacy M&M parts. We stock replacement floats, gaskets, and repair parts for older M&M series including the Series 63, 64, and 67 that are still in service across thousands of commercial boiler installations. Call us at (901) 458-2000 with your model number and we'll confirm availability.

What are Warrick-Gems conductance controls used for in boiler systems?

Warrick-Gems conductance level controls use probe-type sensing to detect water levels in boiler feedwater systems, condensate receivers, and deaerators. Their relay panels and DFC dual-function controls provide pump start/stop and low-water cutoff signals based on water conductivity. They are a common OEM component on commercial boiler feedwater packages ā€” we stock replacement relays, probes, and complete assemblies.

Related Categories

Commonly ordered alongside boiler controls.

Flame Safety Burner Controls Pressure Switches Gas Valves & Controls Pumps & Motors Relief Valves Temperature Controls

For emergencies, outside of business hours, call #901-604-7069