Electric Low Capacity

Light Duty Commercial

Electric cement lined water heater Model E
  • Light Duty
  • 6 - 119 Gallon Capacity
  • Up to 12KW - 1 Phase or 3 Phase

Ceiling Hung Horizontal

Electric horizontal ceiling hung water heater Model HE/HSE
  • Horizontal, Ceiling Hung
  • 19 or 30 Gallon Capacity
  • Up to 20 KW - 1 or 3 Phase

Heat Pump

Hybrid electric heat pump water heater Model PBX
  • Heat Pump Water Heater
  • 40 - 119 Gallon Capacity
  • 1 or 3 Phase

Point-Of-Use Water Heater

Mini compact point of use water heater
  • Point-of-Use
  • 2.5 Gallon Capacity
  • Digital Display

Point-Of-Use Storage

Point-of-use electric water heater Model CE110
  • Point-of-Use
  • 1 Gallon Capacity
  • 1000 or 450 Watts - 1 Phase

Point-Of-Use Tankless

Electric tankless point-of-use water heater Model R Tankless
  • Whole House / Point-of-Use
  • Availabe 3 thru 27 KW - 1 Phase

Circulation (Instantaneous)

Electric circulation heater Hubbell Model CR
  • Circulation (Instantaneous)
  • Heavy Duty Construction
  • 25-1600 KW - 1 or 3 Phase

Industrial Process Heater

Model V16
  • Process Systems & Industrial
  • ASME Stamped
  • Up to 88 KW - 1 or 3 Phase

Heavy Duty Commercial

Commercial heavy duty electric storage water heater Model SE
  • Heavy Duty
  • 6-119 Gallon Capacity
  • Up to 58 KW - 3 Phase

Tankless Commercial

Electric tankless water heater Model HX/TX
  • Tankless Commercial
  • Highly efficient tankless
  • Up to 162 KW - 1 or 3 Phase

Large ASME

Large capacity electric storage tank water heater Model SH
  • Large Capacity
  • 80-5000 Gallon Capacity
  • All KW ratings - 1 or 3 Phase

Commercial Condensing Gas Water Heater

Gas tankless water heater Model NX
  • High Efficiency Condensing Burner
  • 316L SS ASME Heat Exchanger
  • BTU input from 200,000 to 800,000 MBH

Commercial/ Industrial
Condensing Gas Water Heater

Gas tankless water heater Model NXT
  • High Efficiency Condensing Burner
  • 316L stainless steel and ASME stamped heat exchanger
  • BTU input from 200 to 400 MBH

DI / RO Gas

DI/RO gas fired tankless water heater Model DGX
  • DI/RO Water Heater
  • High Efficiency Condensing Burner
  • 199,950 and 250,000 BTU

Condensing Gas
Storage Water Heater

Condensing gas storage tank water heater Prime
  • High Efficiency Condensing Burner
  • Removable 316L SS Heat Exchanger
  • 55,000 BTUs

Large ASME
Steam Heater

Steam fired water heater large capacity Model ST
  • Storage Type
  • 80-5000 Gallon Capacity
  • ASME Stamped

Packaged Semi-Instantaneous

Semi-Instantaneous Steam Fired Water Heater Model STX
  • Semi-Instantaneous
  • Space saving design
  • Provides 10,500 GPH


Storage tank steam fired water heater Model PS
  • Light Duty
  • 65-119 Gallon Capacity
  • For low demand/recovery

High Capacity Instantaneous

Instantaneous steam fired water heater Model F
  • Instantaneous
  • 7 Sq. Ft. of floorspace
  • Up to 120 GPM

Semi-Instantaneous Indirect

Indirect fired semi-instantaneous water heater Hubbell Model BWX
  • Semi-Instantaneous
  • Vertical or Horizontal
  • ASME Stamped

Large ASME

Indirect fired storage tank water heater Hubbell Model BW
  • Storage Type
  • Vertical or Horizontal
  • 80-5000 Gallon Capacity

Small Capacity Indirect

Indirect fired storage tank water heater model T Transflow
  • Indirect Fired
  • 35-119 Gallon Capacity
  • Utilizes boiler water


Solar water heater Model SLN
  • Solar Heater
  • Vertical Storage Type
  • 65-119 Gallon Capacity

Indirect Plate Heat Exchanger

Plate Heat Exchanger Indirect Fired Water Heater Model BWP
  • Fully Packaged System
  • Full Range of Styles/Sizes
  • Storage Type

Indirect Plate Heat Exchanger

Plate Heat Exchanger Indirect Fired Water Heater Model BWXP
  • Compact Design
  • Instantaneous
  • Replaceable brazed plate or plate and frame


ASME and None ASME storage vessels Hubbell Model StorageTank
  • ASME & Non ASME designs
  • Hydrastone Cement
  • Vertical or Horizontal


ASME and None ASME storage vessels Hubbell Model BufferTank
  • Carbon Steel Construction
  • Long Warranty
  • ASME Section VIII, Division 1


Electric hazardous location water heater Model ER
  • Hazardous Location
  • 10-5000 Gallon Capacity
  • Up to 1600 KW - 1 or 3 Phase

Tepid Water for Emergency Fixtures

Electric safety shower water heater Model EMV
  • Emergency Tepid Water
  • Fully packaged system
  • Integrated mixing valve

Industrial Process Heater

Model V16
  • Process Systems & Industrial
  • ASME Stamped
  • Up to 88 KW - 1 or 3 Phase

RO / DI Heater Compact

DI/RO electric hot water heater Model HD
  • RO/DI Water Heater
  • Point-of-Use Heater
  • Up to 88 KW - 1 or 3 Phase

RO / DI Heater Storage

DI/RO electric hot water heater Model D
  • RO/DI Water Heater
  • 1-119 Gallon Capacity
  • Up to 88 KW - 1 or 3 Phase

Emergency Shower Tankless

Electric tankless safety shower water heater Model ETX
  • Tankless Emergency Tepid Water
  • NEMA 4 Standard
  • Up to 88 KW - 1 or 3 Phase

Fully Integrated Package

Model Packaged Skid Electric Fluid Heating System
  • Customized to your specifications
  • Full featured system ready for your application

Industrial Process Heater

Electric process industrial water heater Model V
  • Customized to your specification
  • Full featured system ready for your application

Light Duty

Electric water heater for shipboard marine use single phase power Model ME
  • Light Duty
  • 6-119 Gallon Capacity
  • Up to 6 KW - 1 Phase

Heavy Duty

Electric water heater for shipboard marine use three phase power Model MSE
  • Vertical
  • 6-119 Gallon Capacity
  • 1 or 3 Phase - Up to 58 KW

Large ASME

Electric water heater for shipboard marine use large capacity Model MSH
  • Large Capacity
  • 80-5000 Gallon Capacity
  • All KW ratings - 1 or 3 Phase


Naval shipboard marine electric water heater Hubbell Model 177
  • MIL Spec Navy Heaters
  • Comforms to MIL-H-965
  • Shock and EMI protection


Electric tankless water heater for shipboard marine use model MHX/MTX
  • Tankless Marine Heater
  • Provides 180°F water
  • 11 to 54 KW - 1 or 3 Phase

Fully Integrated Package

Shipboard Electric Water Heating System Model Integrated Skid
  • Customized to your specifications
  • Full featured system ready for your application

Electric Booster

Electric booster water heater Model J
  • Booster Heater
  • Provides 180°F water
  • Up to 88 KW - 1 or 3 Phase

Foodservice Tankless
Electric Booster

Electric tankless booster heater Model JTX
  • Tankless Booster Heater
  • Provides 180°F water
  • 11 to 54 KW - 1 or 3 Phase

Foodservice Gas
Fired Booster Heater

Gas fired booster heater Model PT
  • Gas Booster Heater
  • High Efficiency Condensing Burner
  • 55,000 to 199,000 BTU

Foodservice Point-of-Use
Water Heaters

Mini compact 2.5 Gallon Booster Heater
  • Hot water for remote locations
  • Perfect for glasswashers
  • 120V models available

Foodservice Sanitizing
Sink Heater

Model JSK
  • Provides rinse water for manual warewashing
  • Perfect for 3 compartment sinks
  • Available in 3,4,6 or 9 KW

Food Rethermalizer Baine-Marie Heater

Model JFR
  • Mounts under sink or holding vessel
  • Keeps food at SERV safe temperature
  • Available up to 9 KW

Foodservice Point-of-Use
Water Heater

Compact point-of-use electric water heater Model J1SSA
  • Point-of-Use
  • 1 Gallon Capacity
  • 1000 Watts - 1 Phase

Immersion Heating

Electric immersion tubular style heaters
  • Immersion Electric Heaters
  • Flanged or Screw Plugs Types
  • All KW ratings - 1 or 3 Phase

Heat Transfer

Heat exchanger and heating coil water heaters
  • Immersion Heat Transfer Coils
  • U tube type
  • Range of Materials

Stainless Steel T & P
Relief Valve

Stainless Steel T & P Relief Valve
  • 316 L Stainless Steel construction
  • Corrosion Resistant
  • ASME Section IV, HV Stamped

Gas Heat Exchanger

gas hx
  • 316 L SS Heat Exchanger/Burner
  • 55,000 BTU/HR input
  • Digital temperature controller
Electric High Capacity
Gas Fired
Steam Fired
Special Purpose
Foodservice Equipment
Elements & Exchangers
Product Center
Steam fired water heater large capacity Model ST
Still have questions? Complete this form
*State /

Model ST

Packaged Steam Fired Water Heater

Utilizes Steam to Heat Domestic Water, Semi-Instantaneous or Storage Type Heaters

The Model ST is a fully packaged steam fired water heater designed to be a reliable and long lasting source for hot water. Each component is carefully selected to ensure performance in even the most demanding application. Whether you are heating potable water in a commercial building or process water in an industrial application, you can select a Hubbell Model ST to do the job. When you specify and install a Hubbell ST model water heater you will have confidence in knowing that the owner will be provided with a quality product that is a long lasting and trouble-free source for hot water.

Learn More About Hydrastone Cement Lining

  • Reliable

    • Only high grade materials used in construction to ensure long operating life
    • Hydrastone cement lining provides superior protection and tank longevity
    • Heavy duty construction withstands demanding commercial/industrial use
  • Packaged System

    • Factory supplied with all steam controls saving time and money during installation
    • All steam operating controls are factory sized and selected to ensure reliable operation
  • Versatile

    • Full range of styles, sizes, and optional features to meet your exact heating needs

Steam Component General Configuration

The steam control valve maintains accurate water temperature in a steam fired water heater by regulating the flow of steam through the heating coil.

There are four types of steam control valves available for use on a steam fired storage water heater.

Model ST How It Works
  • Self Operating

    The valve design includes a bulb and capillary assembly charged with a thermally responsive vapor. The expansion/contraction of the vapor acts upon the valve bellows in order to control the flow of steam throught the valve. No external power source is required for operation.
  • Pneumatically Operated

    In this configuration the building air supply feeds a factory installed temperature controller which operates the steam control valve. The temperature controller sends a precise air signal to the steam control valve which adjusts the flow of steam into the heating coil. The temperature controller is fully adjustable from 50-250°F and requires 20 psi air at a maximum consumption of 0.5 SCFM.
  • Pilot Operated

    A pilot operated control valve is the most widely used type of valve for standard water heating applications. In this type of valve, a temperature pilot device utilizes steam to operate the main valve. No external power source is required other than steam. This is a highly dependable temperature control system which is suitable for most commercial and industrial applications. As an option, this valve may include a pressure reducing pilot which limits the steam pressure to a predetermined maximum.
  • Electronic Operated

    This control valve is similar to a pneumatically operated system, except in this case the temperature controller is a PID digital display electronic temperature controller which outputs a 4-20mA signal to a compact motor mounted on the steam control valve in order to proportionally control the flow of steam to the heating coil. The temperature controller displays set point as well as actual water temperature and is available with an RS486 communications port for remote control.

Model ST Storage Type Standard Equipment

Vessel Construction

  • All welded carbon steel vessel designed and built in strict accordance with the ASME Code Section VIII and stamped, certified and registered with the National Board of Boiler and Pressure Vessel Inspectors
  • All internal tank surfaces are lined with a minimum of 5/8" thick Hydrastone cement for superior protection and tank longevity
  • Designed for 125 psi working pressure and hydrostatically tested

Steam Operating Controls

  • Steam operating controls are factory selected, sized, piped and tested to ensure reliable operation
  • All steam components are factory plumbed with schedule 40 black iron pipe and ready for steam and condensate connections
  • High quality cast iron pilot operated steam control valve modulates the flow of steam through the heating coil to provide accurate water temperature control
  • Cast iron Y strainer with 20 mesh screen protects the steam controls and coil from dirt and debris in the steam supply
  • Thermostatic drip trap removes condensate from the steam supply line
  • Heavy duty cast iron float and thermostatic main condensate trap for optimum efficiency
  • Brass vacuum breaker and dial steam pressure gauge

Steam Heating Coil

  • A high quality factory installed 2 pass U-Tube heating coil constructed from 18 gauge 3/4" O.D. single wall copper tubing designed for a maximum working pressure of 150 psi
  • All wetted parts are non-ferrous for maximum longevity
  • Heavy duty fabricated steel head with threaded NPT steam and condensate connections
  • Copper lined tube sheet
  • Reference Heating Coils for detailed heating coil construction features


  • Heavy duty 3" thick fiberglass insulation covers 100% of the pressure vessel for maximum operating efficiency and minimal stand-by heat loss
  • Heavy gauge painted galvanized steel protective outer jacket
  • Heavy duty integrally welded steel supports for floor mounting
  • Full five (5) year Non Pro-Rated tank warranty and a one (1) year steam component warranty
  • ASME rated combination T&P relief valve set at the tank working pressure and 210°F

Outline Dimensions

Model ST (Vertical)

Model ST Vertical Outline Dimensions

Model STH (Horizontal)

Model STH Horizontal Outline Dimensions

Overall Dimensions, Models ST and STH

Actual Storage Capacity (Gallons) Overall Dimensions (Inches) Storage Tank Nominal Storage Capacity (Gallons) Inlet Outlet Sizing (NPT) Approx. Shipping Weight (Lbs.)
Vertical Horizontal
Diameter "A" Height "B" Length "C" Width "D" Height "E" Diameter x Length
80* 26 65 60 26 32 22 x 54 90 1.5 700
120* 28 75 68 28 34 24 x 64 140 1.5 900
150* 30 79 72 30 36 26 x 68 170 1.5 1100
175 36 73 67 36 44 30 x 63 195 1.5 1500
200 36 82 76 36 44 30 x 72 220 1.5 1700
225 36 89 83 36 44 30 x 79 245 1.5 1750
250 42 74 68 42 50 36 x 64 285 1.5 1850
275 42 80 74 42 50 36 x 70 310 1.5 2000
300 42 88 82 42 50 36 x 78 345 1.5 2180
325 42 92 86 42 50 36 x 82 360 1.5 2300
350 42 94 88 42 50 36 x 84 370 1.5 2500
375 48 81 75 48 56 42 x 71 425 1.5 2600
400 48 85 79 48 56 42 x 75 450 1.5 2700
425 48 88 82 48 56 42 x 78 470 1.5 2900
450 48 93 87 48 56 42 x 83 500 1.5 3000
475 54 79 73 54 62 48 x 69 540 2 3100
500 54 82 76 54 62 48 x 72 565 2 3225
525 54 85 79 54 62 48 x 75 590 2 3350
550 54 89 83 54 62 48 x 79 620 2 3400
575 54 93 87 54 62 48 x 83 650 2 3500
600 54 95 89 54 62 48 x 85 665 2 3650
700 54 107 101 54 62 48 x 97 755 2 4000
800 54 119 113 54 62 48 x 109 850 2 4300
900 54 132 126 54 62 48 x 122 940 2 4800
1000 54 145 139 54 62 48 x 135 1060 2 5200
1250 60 149 143 60 68 54 x 139 1380 2 5600
1500 60 174 168 60 68 54 x 164 1625 2 6000
1750 66 168 162 66 74 60 x 158 1935 3 7400
2000 66 185 179 66 74 60 x 175 2145 3 8100
2500 78 169 163 78 86 72 x 159 2800 3 8200
3000 78 197 191 78 86 72 x 187 3300 3 8300
3500 90 174 168 90 98 84 x 164 3935 6 FLG. 8900
4000 90 195 189 90 98 84 x 185 4440 6 FLG. 9800
4500 N/A N/A 168 102 108 96 x 160 5015 6 FLG. 10700
5000 N/A N/A 183 102 108 96 x 175 5485 6 FLG. 11600
All dimensions are approximate and subject to change. Please reference the submittal drawing for actual dimensions. The tank selections above are shown for convenience. A full selection of storage capacities is available.
* 80, 120, and 150 gallon tanks do not come equipped with a manway.

Model ST Optional Equipment


  • Alternate protective lining:
    Phenolic epoxy resin, Flame spray copper, Hot dip galvanizing, other
  • Alternate vessel construction:
    Stainless Steel Type 304 or 316L, 90/10 Copper-Nickel, other
  • Alternate working pressure: Specify

Steam Heating Coil

  • Double wall tubing with a leak detection port
  • Alternate tubing material:
    Stainless Steel, 90/10 Copper-Nickel, Admiralty, Other
  • Fabricated steam head constructed from:
    Stailess Steel, Copper Alloy, Other


  • Skid mounting on heavy duty all welded I Beam
  • Type 304 stainless steel protective jacket
  • Manway 12" x 16" or Inspection Opening 3" NPT

Operating Controls

  • Steam controls can be factory sealed and sized, but shipped loose for in the field installation by others.
  • Various steam control vavles are available to meet the specific needs of your application: Self-operated type, pneumatic operated, electronic operated, separate pressure reducing pilot type
  • Single solenoid safety system closes the steam supply to the control valve should the water temperature in the tank reach the hi-limit set point. Requires 120 volt 5 amp electrical service
  • A double solenoid safety system dumps over heated water in the storage tank to drain addition to closing the steam supply to the control valve. Requires 120 volt 5 amp electrical service
  • Intra-tank circulation pump pacakage continuously circulates water within the tank in order to reduce stratification. All bronze fractional HP pump
  • Anticipator control system forces incoming cold water over the control valve sensing bulb in order to begin heating water immediately
  • Dial water thermometer and pressure gauge factory installed in the tank
  • Factory wrapped and baffled steam coil with integral pump package

Please note: optional equipment may impact overall dimensions and weight. Please request submittal drawing from factory.

Model Number Designation ST

Step 1
ST = Vertical
STH = Horizontal
Step 2
Storage Capacity:
80-5000 Gallons
Step 3
Vessel Type:
SL = Cement Lined Steel
GL = Phenolic Lined Steel
M = Galvanized Steel
CN = Solid 90/10 Copper Nickel
SS = Solid Stainless Steel
(Type 304 or 316L)

Step 4
SL = Hydrastone Cement
lined tank
SS = Solid stainless
steel tank
CN = Solid 90/10
copper-nickel tank

Step 5
Coil Type:
S = Single Wall
D = Double Wall



A vertically installed 600 gallon steam fired water heater with a cement lined steel storage tank rated to heat 1250 GPH at a 100°F temperature rise.

Search FAQs

Model ST Specific Questions

What temperature should I set my water heater?

For typical domestic potable hot water service the temperature of your water heater at 125°F is sufficient. This prevents wasted energy (which means cost savings for you) and also decreases the possibility of scalding water burns. If you run out of hot water on this setting, increase the temperature by five degrees incrementally until your hot water needs are met. The goal is to have the temperature set just high enough to meet your needs but within safe operating parameters. Please note that a water heater in and of itself should not be relied upon as the ultimate temperature controlling source for the hot water delivered to your fixtures. Please consult local and state codes for installation of the proper and code approved (ASSE 1016, 1070, 1017) mixing devices to achieve the safe delivery of hot water to the fixtures. For a more complete information please download the whitepaper PDF titled "Understanding Potential Water Heater Scald Hazards" developed by ASSE at the following link ASSE Whitepaper

Is it OK to use softened water with my cement lined tank?

Yes it is OK. A water softener system will not affect the longevity or operation of a Hubbell cement lined water heater tank. A water softener is typically installed when a potable water system has hard water resulting in the need to soften the water. Unfortunately, the salt used in a water softener corrodes the anode rod and exposed steel surfaces of the water heater tank, rapidly causing a glass lined water heater to corrode and leak within a few years. This is an issue for a glass lined water heater due to its reliance on a sacrificial anode, however because a cement lined tank does not use a sacrificial anode softened water is of no concern to the Hubbell cement lined tank.

What is a sacrificial anode and does a cement lined tank need one?

All water heaters constructed using a steel tank requires a lining to protect the internal steel surfaces from corrosion. Certain linings (i.e. glass and epoxy), due to their nature, have unavoidable holes and imperfections resulting in exposure of the steel tank. As a result of this deficiency, the manufacturer will install an anode rod(s) in an attempt to delay corrosion of the steel tank. An anode rod is typically made of aluminum, magnesium or zinc, is a maintenance item that requires periodic inspection and replacement, and is often times the cause of a “rotten egg” odor to your hot water. Often referred to as a sacrificial anode rod because, over time, it slowly dissolves, sacrificing itself as it is attacked by aggressive substances in the water which would otherwise attack the steel tank through the pinholes and imperfections of the glass or epoxy lining. A cement lined steel tank on the other hand does not require an anode because of the thickness and guaranteed 100% coverage of the cement lining over all internal surfaces of the steel tank. This eliminates the need for an anode rod in a cement lined water heater, resulting in a significantly longer life compared to a glass or epoxy lined water heater. For a further discussion please click on the following link Cement Lining

What is the max water temperature setting?

The Hubbell cement lined tank is suitable for storing water up to 194°F. However, it should be noted that your water heater will likely require optional control accessories to achieve this temperature, but there is no concern regarding the ability of the lining to withstand this temperature. Additionally, there are numerous safety concerns that must be considered when storing water at elevated temperature, please consult factory.

What is the delivery time?

In most cases the delivery time for a Hubbell water heater is approximately 10 weeks after release for production, but can be 16 weeks or more depending upon the particular requirements of your application. However, there are various sizes and configurations which Hubbell has in stock for “Quick Ship” (as early as next day t to 2 weeks) to accommodate situations that require shorter delivery. Please consult with your Hubbell Sales Engineer to discuss delivery times for your application.

General Questions

Where can I purchase a Hubbell water heater?

There are numerous ways to purchase a Hubbell water heater depending upon the model you desire and your geographic location. The easiest way is to contact Hubbell directly at 800-647-3165 and ask for the sales department where you will be directed to either our local representative or our order entry department for quick and easy ordering.

Where can I purchase replacement parts?

Parts are available for your Hubbell water heater direct from the factory. Please call 800-647-3165 and ask for our parts department. Please have your model and serial number handy.

I don't see the size or feature I need, what do I do?

Hubbell has more than 35 product families available in over 4,000,000 configurations. There are numerous features, configurations and ratings we provide but for practical reasons are are not listed in the sales brochure. If you have a specific requirement and you do not see it in the brochure, please contact a Hubbell Sales Engineer...chances are we have what you need.

What should I know about Legionella disease?

Legionella is the bacteria responsible for Legionnaire’s Disease, an acute bacterial infection of the lower respiratory tract. This bacterium was first identified in 1977 by the Centers for Disease Control as the cause of an outbreak of pneumonia that caused 34 deaths at a 1976 American Legion Convention in Philadelphia. Pontiac Fever is a less severe, non-pneumonia, flu-like disease that is associated with and likely caused by Legionella bacteria. Legionella is a fairly common water bacterium and has been found to exist widely in many surface water sources including lakes, rivers, streams and ponds. It can also be found in ground water sources and some soils. At the levels found in these naturally occurring sources it typically does not pose a threat to public health. When the bacterium enters a domestic water system it can find an ideal host environment of warm water temperatures (105-115°F), stagnant water areas (isolated storage tanks and dead-end piping legs) and ample food sources (sediment, scale, deposits and biofilm). Under these conditions Legionella can rapidly colonize, forming higher concentrations that can pose the public health threat of Legionnaire’s Disease. There are many methods of controlling colonization of Legionella bacteria. However, a widely accepted and preferred method is to maintain the hot water system storage temperature continually at or above 140°F. Unfortunately, the elevated temperature necessary to minimize the growth of and kill Legionella bacteria has the potential to cause serious thermal shock and scalding injuries. As such, many plumbing engineers will specify that the water heater be set to maintain water temperatures at 140°F or higher to reduce the risk of Legionella, but then specify the appropriate mixing valve to ensure safe delivery of hot water to the fixtures. For a more thorough discussion of Legionella please go to here and the following link to the US Department of Labor OSHA information regarding Legionnaires’ Disease OSHA here

My question is not found in these FAQ’s, where do I look next?

Check out the Hubbell Product Center at Here for a complete listing of all technical documentation available by model. Get easy access to Installation, Operation & Maintenance manuals, Sales Brochures, Service Bulletins, Wiring Schematics, Parts Breakdowns and various other technical documents related to the full line of Hubbell water heaters. Or, if you prefer, please call us at 800-647-3165 and ask to speak to a Sales Engineer.


Many of our products literature is available online for download. To open these files, a PDF viewer is required. If you do not have one, Adobe provides Acrobat Reader free of charge for viewing only. Use this link to download Acrobat Reader. You may also choose to download the file to your PC for future reference or printing. On most operating systems, simply right-click on the links below, choose "Save target as..." or "Save link as...", choose a location and it will save the document to your computer for future reference.

Model ST Specific Questions

Where can I purchase replacement parts?

Parts are available for your Hubbell water heater direct from the factory. Please call 800-647-3165 and ask for our parts department. Please have your model and serial number handy.

For Further Assistance Please Contact a Hubbell Tech Support Rep.

Tech Support Email

Hubbell Heaters
45 Seymour Street
P.O. Box 288
Stratford, CT 06615-0288
Tel: 203-378-2659
Fax: 203-378-3593
Product Center
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