Rheem water heater (C) Daniel Friedman Find Water Heater Age or Manuals
Water Heater, Geyser, Cylinder, Calorifier Contacts & Water Heater Manuals

InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.

Water heater age decoders, water heater manual sources, all brands:

In addition to details of how to de-code water heater age for all water heater brands we give six ways to determine the age of a water heater. We also discuss the conditions, maintenance, and factors that affect how long a water heater can be expected to last.

Here is a Heating Furnace or Boiler Data Decoding Document that Aids in Determining Water Heater Age. How long should a hot water maker or hot water heater last.

What factors determine the life of a water heater - independent of the water heater's age? DECODING GUIDES for water heater age, 5 data tag decoding documents, books, methods. Geyser & cylinder warranties & water heater life.

We give contact information for water heater, geyser, cylinder, calorifier manufacturers and for water heater installation, operation, & troubleshooting manuals.

Our photo at page top shows an oil fired water heater with a backpressure problem and other safety concerns like a missing extension tube on that relief valve, and maybe a missing draft regulator and perhaps an oil line that is not protected from damage.

We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.

How to Determine the Age of a Water Heater

Rheem water heater (C) Daniel Friedman

Article Contents


WATER HEATER AGE DECODING GUIDES - six methods for figuring out the age of a water heater - listed just below:


Our photo above shows a gas-fired Rheem™ water heater. The label containing the unit's serial number is probably at the water heater top left. The label above the gas control at the water heater bottom typically contains water heater lighting instructions.

[Click to enlarge any image]

Water Heater Age Decoding Charts & Tables: Six ways to find out how old your water heater actually is

1. Specific Water Heater Age Decoding Guides by Brand

Specific Water Heater Age Decoding Guides by Brand are given below in an alphabetical list starting at at WATER HEATER DECODING by BRAND - list of water heater brand names, manuals, contact information, found below in this article.

The data tags (containing the water heater's age) for this heater are hidden by its insulating blanket. Readers who need to determine the age of air conditioning and heat pump equipment should see A/C DATA TAGS.

Carson Dunlop Technical Reference Guide (C) Carson Dunlop AssociatesHow can we determine the age of a residential water heater? By looking at and decoding data on the water heater's label.

Nearly all modern water heaters, electric, oil fired, or gas fired, include data tags and stickers that indicate the year and month of manufacture of the water heater.

That doesn't tell you exactly when a water heater was installed in a particular building but it does indicate the age of the water heater itself.

However some manufacturers encode the year and month of manufacture of their water heater in the product's serial number so that the water heater age is not immediately obvious.

2. HVAC Data Tag Decoder Carson Dunlop Associates Technical Reference Guide HVAC & Water Heater Serial Number De-Coding Book

Carson Dunlop Associates Associates provide a most-comprehensive Technical Reference Guide to heating and cooling equipment manufacturers that includes water heater manufacturers.

For an encyclopedic reference including manufacturers, history, contact information, and serial number decoding we recommend this book.

3. Scott LeMarr's Water Heater Age Determination Chart

AO Smith water heater label shows age (C) Daniel FriedmanScott LeMarr has generously shared his free WATER HEATER AGE DETERMINATION CHART that decodes both furnace age and water heater age from label data.

Scott includes data for many brands of water heater, including hot water systems produced by the manufacturers listed just below. [PDF linked to return here. You can also use the "BACK" button on your browser to return to this page.


Water heater age is encoded in data on the information label on these water heaters: Ambassador water heaters, American water heaters, ACE water heaters, A.O. Smith water heaters, Apollo, Aqua Temp, Aqua Therm,

Best water heaters, Bosch water heaters,Bradford White, Cafos, Champion, Crosley, Energy Saver, Envirotemp water heaters, GE water heaters,

Glascote water heaters, Golden Knight water heaters, GSW, Hotpoint water heaters, JC Penny, Jetglas, JW or John Wood, Kenmore water heaters (Sears Brand), Lochinvar, Lowes, Mainstream, Maytag water heaters, Montgomery Wards, Knight, P

ermGlas, Reliance water heaters, Revere, Rheem water heaters, Rheem/Rudd/Richmond water heaters, Rinnai, Security, Shamrock water heaters, Standard water heaters, State/Reliance/Sears brand water heaters, Thermo-King, Vanguard water heaters, US Craftsmaster, US Water Heaters, and Whirlpool water heaters.

Mr. LeMarr has also shared his FURNACE AGE DECODING CHART with InspectApedia readers.

You can also use the "BACK" button on your browser to return to this page.

4. Energy Label on Water Heaters or other Equipment Year May Help Decode the Equipment Age

Our photo (at above left) is from the A.O. Smith EnergySaver water heater in our laboratory. Enlarging this image you will see a date 12/26/02.

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Scott points out that

On occasion there is a yellow "Energy" label on the unit and at the bottom (sometimes middle) will tell you what ANSI Spec it was built to or it may give you an estimated cost on a particular year. If it reads ANSI Spec 1994 that it would have to be 94 or newer typically these specs come out every 2-3 years.

5. Direct help from water heater manufacturers

For page speed & reader convenience we moved this topic to a separate article - at WATER HEATER COMPANIES by country: Australia, New Zealand, USA, UK etc

6. How to Decode Non-Standard, Unknown Water Heater Serial Numbers & Data Tags to Guess Water Heater Age

Rheem water heater label (C) Daniel FriedmanApproaches to finding the age of any water heater / cylinder / geyser are given here. If your water heater brand or trader name doesn't appear in the list at WATER HEATER DECODING by BRAND you can use this general data tag decoding guide.

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  1. Find the data tag (as I've discussed above) that will allow us to decode the date of manufacture of the heater.

    Look for reasonable apparent year ecodings in the equipment serial number in format MM YY

    The unit's serial number, MM02-2147713-260 identifies the model and its date of manufacture. The "02" following MM indicates that this unit (in our laboratory) was manufactured in 2002 and the -2 following the MM02- decodes to February.

    In a second water geyser age (cylinder age, water heater age) example, Rheem water heaters provide first the month MM and then the year in the first four digits of the water heater's serial number.

    The label shown here includes 0884 at the beginning of the serial number - August 1984.

    General approach to decoding unfamiliar water heater serial numbers to get water heater date of manufacture

    Typically the manufacturer used

    a two digit month and two digit year,

    1 digit month that used alphabetic characters

    2 digit week (1-52) and 2 digit year

    WITH sometimes a plant ID code in the serial number, typically a letter, separating the numeric or other age and serial number digits.

    So if we have no other data, we look for a pattern that can decode to a reasonable year using those schemas.

    Using Rheem water heaters as an example many, not all, water heaters made by Rheem were sold under other brand names such as Montgomery Ward.

    Modern Rheem water heaters use a 10 digit code:

    MMYYX12345 where X is the plant code and 12345 a consecutive unique ID and of course MM YY are month and year.

Wards Signature 500 glass lined water heater geyser cylinder (C) InspectAPedia DP
  1. Find the installation and service manual for this particular water heater.

    Often the installation guide is stuck behind a pipe or overhead nearby. The manual may include a purchase of sale receipt, handwritten notes on installation date, or even lacking these, it will have a publication date that gives the earliest-likely manufacturing age of this specific heater.
  2. Note the age of the building where the heater (geyser, cylinder) is installed.
  3. Note the age of components used to install the heater such as its wiring and plumbing materials
  4. Contextual clues of water heater age: Note the age and location of the building. That will give us some context. Also note the age of remodeling or building changes.

    Here is an example commentary about water heater age we provided to a reader:

    Your Signature 500 electric water heater (or geyser or cylinder depending on where you live) looks like a much newer installation. I see light colored wood 2x studs (recent construction) and shiny copper electrical wiring at the ground connection at the heater top. Also I see the use of modern red PEX tubing used for the temperature/pressure relief valve discharge tube.

    Certainly the heater could be older than its present wiring and plumbing, but if those are any guide, this is not a very old unit.

    Depending on where you live we could get a more accurate estimation of the year of installation of the water heater plumbing as presently shown even before finding the heater's data tag (which I am betting is there somewhere). PEX surged in popluarity in the U.S. beginning around 2000.

    For example, in the United States, California, one of the last adopters, did not approve the use of PEX (cross-linked polyethylene tubing) for household plumbing until 2007 (on a case by case basis) and not until 2009 for all homes.

    More about PEX plumbing pipes used for building water supply and hot water heating applications can be read at PEX PIPING INFORMATION.

  5. Look around the heater for a water heater service tag, perhaps stuck in a floor joist or on a wall top nearby - that can give an idea when the heater was installed or may give that precise date.

Water Heater Age Decoding, Manufacturers, Manuals, Contact Information by Brand - alphabetical list

Bradford White water heater identification (C) Daniel FriedmanWhile the most complete water heater age de-coding charts and tables are in the book and PDF files we list above, here we also list water heater age or serial number decoding charts for particular water heater brands or products requested by readers.

Because some water heater manufacturers (such as American) produce heaters (or calorifiers or cylinders) sold under multiple brands, you may also find your water heater's age decoder by using your browser's On-Page Search feature (Ctrl-F or CMD-F).

For example, Ace, Apex, Aqua Temp, Aqua-Therm ... Tru-Value, Whirpool and more brand names are all produced and decoded by the American Water Heater Age Decoder.

If your water heater does not appear in this list you are welcome to contact us using the page top or bottom CONTACT link and we'll help reseach your question at no charge.

If the serial number in your water heater data tag format does not match what's given in each of these guides, see DATA TAG DECODING ADVICE for NON-STANDARD DATE CODES.

Antique water heater in Dunedin, New Zealand (C) Daniel FriedmanThe beautiful antique water heater shown in our photo is mounted on the wall of a kitchen in Dunedin, New Zealand.

Aerco Gas Fired Water Heater Manuals

American Water Heater Age & Amerian Appliance Manufacturing Water Heater Age & Manuals

Amerian Brands Water Heater data tag (C) Daniel Friedman

Photo: data tag on an American Water Heater, showing serial number 9950123040. This serial number decodes to 1999 week 50.

[Click to enlarge any image]


Details about American Appliance Manufacturing water heaters are also found at AMERICAN WATER HEATER AGE DECODING

Amtrol Indirect Water Heaters

Also see

A.O. Smith Water Heater Age Decoding

For AO Smith water heaters: Current date code: Ser# YYMM123456

See AO SMITH WATER HEATER AGE & MANUALS for complet details.

Atwood Water Heater Manuals

Bock Water Heaters

Bock oil fired water heater, abandoned due to leakage (C) Daniel Friedman

Photo: an abandoned, leaky Bock oil fired water heater in a New York home.

Bosch Water Heater Technical Support & Water Heater Manuals

Also see

Bowen Gas Water Heaters, Atwood Bowen, Dometic

Bradford White Water Heater Age Decoding Guide

Bradford White water heater age is encloded as two letters in water heater's serial number using an alphabetic code for year and month as follows:

Current Bradford White water heater date code format: YM234567...

See complete details and decoding tables for Bradford White water heaters or calorifiers at BRADFORD WHITE WATER HEATER AGE DECODER

Buderus Indirect Fired Water Heater Manuals

Buderus water heater at

Burnham indirect water heaters

Cal-O-Rex Gas Fired Water Heaters

Cal-O-Rex gas water heater (C) Daniel Friedman at

Cal-O-Rex water heaters, gas fired, are widely sold in Mexico

[More data & citation in process, photos invited- Ed.] Below: a Cal-O-Rex gas water heater data tag.

Cal-O-Rex Dura-Glas is another brand used by this company.

Cal-O-Rex gas water heater (C) Daniel Friedman at

Chrysler AirTemp Water Heater Age Decoding Guide

Chrysler Air Temp Water Heater Age Query:  (Mar 16, 2012) Dan said: Need to find age of Chrysler Airtemp Gas Furnace: Model #4208-10, Ser #'s hard to read.

Could be: Ser# 00584865, 06584865, or 0G584865 

Reply: best guess 1970.

From Carson Dunlop Associates Associates comprehensive Technical Reference Guide

Chrysler Air Temp Products: see AirTemp and Fedders. In HVAC serial numbers the first digit is a key to the year of manufacture beginning with 1970.

So SN# 42599229 would de-code to be manufactured in 1974

Contact information for Chrysler Air Temp

Cinsa Water Heaters

The Cinsa water heater shown in our photo was installed outdoors in Uruapan, Mexico. [Details and data tag photos needed]

Cinsa LP gas water heater in Uruapan, Mexico (C) Daniel Friedman at

Electric-Weld Gas-Fired Antique Water Heaters

Electric Weld gas fired water heater, antique (C) Daniel Friedman at

[Citations needed - Ed.]

Edwin Ruud, a Norwegian-American engineer, invented the first electric arc-welded steel cylinder water heater in 1889 in Pittsburg, Pennsylvania. Ruud is credited with the inventionof the electric water heater in that year.


Electric Weld Gas fired water heater, antique, New York (C) Daniel Friedman at Electric Weld Gas fired water heater, antique, New York (C) Daniel Friedman at

Envirotron - Envi-ro-Temp Water Heater Age Decoding Guide

Envirotron Water Heater Age Query: (Nov 7, 2011) Jackie said: I need warranty information also. Product #0726021 Serial #0214115365  model #GIF4034T3NV . It's an Envirotemp water heater. Need to know if it's still under warranty.

Reply: Year 2002, week 14. Details are


Contact Information for Envirotron or Enviro-Temp water heaters:

Everhot Water Heaters, Boilers, Tankless Heaters

Everhot tankless water heaters are still sold, as Everhot, now in Waterville MA, is a division of Therma-Flow
PHONE/FAX: 617-924-3877 • FAX: 617-924-7271 • TOLL FREE PHONE: 1-800-654-8045


FACTORY: Therma-Flow, Inc. • 191 Arlington Street • Watertown, MA 02472 • MAIL: P.O. Box 416 • Watertown, MA 02471-0416

Here is a link to current Everhot tankless water heater information: this will help you understand your hot water system.
here is the company's pertinent web page

Fairbanks Morse Water Heaters & Appliances

Fairbanks Morse Water Heater advertisement (C)

Question: Age & manual wanted for Fairbanks Morse water heater (electric)

2019/03/22 Rene-Philippe Hebert said:

Hi, I'm looking for the age of a Fairbanks Morse water heater model WE39305SE serial 139079-6005, thanks.


Fairbanks Morse Water Heater advertisement (C) InspectApedia.comRene-Phiippe

I'm researching further but have not (yet) found a Fairbanks Morse water heater age key. From your serial number my guess would be 1979.

Fairbanks Morse & Co. produced a remarkable range of products from radios and pumps and water heaters to washing machines and railroad locomotives.

Fairbanks Morse & Co, (Chicago IL USA) with offices in Australia, England, and in many cities across the U.S. and Canada, starting as a scale manufacturer, was a large 20th century manufacturer of heavy equipment including railroad engines (12-cylinder Fairbanks-Morse Model 38D engine) and smaller engines such as the Fairbanks Morse 2,3, and 6 horsepower "Z" throttling governor engines.

Wikipedia's current article on Fairbanks Morse cites 3 entities:
Fairbanks Scales is a privately owned company in Kansas City, Missouri, that manufactures scales.

Fairbanks Morse Engine (FME), a subsidiary of EnPro Industries, is a company based in Beloit, Wisconsin, that manufactures and services engines. - Website:

Fairbanks Morse Pumps is a part of Pentair Water in Kansas City, Kansas, and manufactures pumps.

Currently (as recently as 2019) Fairbanks Morse Pumps were produced under the Pentair name (well pumps & ejector pumps).

It would be helpful if you could add an image of your Fairbanks Morse water heater and a closeup of each of its data tags or labels - one image per comment.

The only image of a Fairbanks Morse water heater we've found is from this 1946 advertisement

Reader follow-up:

Rene-Philippe Hebert said:

Fairbanks Morse water heater data tag, Canadian made (C) Rene-Philippe Hebert

Here what I got. The machine still working!

Ford Products Water Heater Age, Company Information, History, & Manuals


Fowler Electric Water Heater Age Decoding


General Electric Forced Air Furnace & Water Heater Age De-Coding Guide

GE water heater data tag example

A typical GE water heater serial number is formatted as GE AWWYYnnnnn

Details of decoding GE or General Electric water heater serial numbers to obtain the date of manufacture are


Giant Water Heater Age, Data Tags, & Manuals

Data tag details: pending; images of Giant water heater data tag wanted. Use our page bottom or top CONTACT link - Ed.

Question: where to find Giant brand water heater manuals

I am not sure I have come to the right place however are you able to tell me where I could find a 2006 Giant Electric Water Heater Manual for Model 172ETE-3F5m? - Anon in Toronto, Ontario, by private email 2016/07/27


Giant electric water heaters are manufactured by

Usines Giant Factories, Inc., 40 Avenue Lesage Montreal-East, Quebec, Canada H1B 5H3 Tel: 1-800-363-9354 Website:

The company has a "literature request" page at

The Giant 172 series water heaters, aka "Super Cascade" are described by and by

The company's engineering data sheet tells us that a Giant water heater Model 172ETE - 3F5m is not listed but the company currently lists a 172ETE-3F7M as a 74 gallon (279L) or 61 imperial gallon electric water heater using 4500W 240V.

Here is the company's link to the Installation Manual for the Giant 17E heaters:

I am attaching a link to a typical Giant electric water heater installation and operation manual

GSW Hot Water Heater Age De-Coding Procedure - Quel âge a votre chauffe-eau?

The age of a GSW current water heater is coded as YY MM in the first four digits of the serial number, after ignoring any alphabetic letter that starts the serial no. Using the company's example:

GSW heater S/N U0106413635 was manufactured in 2001, June

See ANTHES BOILER / FURNACE AGE for more discussion of age decoding and finding manuals for Anthes

See also JOHN WOOD Co. Ltd.

GSW Water Heater Age Query: (Mar 1, 2013) Lee Harding said: I'm trying to determine the age of my GSW hot water heater. Model 6G505DE1
Serial # 50704 535391. I can't tell from these numbers.

Reply: best guess: week 50 of year 1970

Normally the first two digits of the serial number give the GSW heater's year of manufacture. Your serial numbers don't match this system, perhaps because of wear or smearing or heater particulars.

From your serial number we'd guess week 50 year 1970 - which seems a bit antique. Re-check that you're really seeing a 50 in the first two digit positions.

For GSW water heaters manufactured before 2008 the heater the age is encoded as the first four numeric digits of the serial number as two digits of year followed by two digits of month. Ignore any leading alphabetic character.


For GSW water heaters produced after 2008 the water heater age is also encoded in the first four digits of the serial number but as two digits of year followed by a two-digit week number (weeks 01-52).


Contact information Details & Manuals for GSW Water Heaters

From GSW's website (2017 & 2018), GSW produces for-sale as well as rental-water heaters in Canada.

Haier Water Heaters, Appliances Manuals, Service, Parts - GE

In 2016 General Electric sold its appliance business to Haier, a Chinese home appliance manufacturer for $5.4 billion. After 2016 GE no longer provides lighting, home appliances, cooktops, ranges, refrigerators, nor water heaters.

Hi Test Hoyt Water Heater Age De-Coding Tips

Hoyt Water Heater Age Query: (Nov 5, 2012) Alexandra said: I am trying to find the age of my Hi Test Hoyt water heater. The Serial is SN A87RNH1373190, model A40HM

Reply: best guess 1987. Details along with contact information for Hoyt water heaters are at HOYT WATER HEATER AGE

Hotpoint Water Heater Data Tag Decoding & Water Heater Age

Hotpoint water heaters prior to about 1980 such as those bearing the data tag shown above use serial numbers in the format AAAWWYY 

Hotpoint water heater Serial Number decoding to obtain Hotpoint water heater age and links for Hotpoint water manuals are given in detail at HOTPOINT WATER HEATER AGE & MANUALS

Hoytt Water Heaters

HTP Water Heater Age & Manuals

HTP Water Heater (C) reader

Schematic of piping for an HTC indirect water heater connected to a high efficiency heating boiler, adapted from HTC Instructions cited in this article.

Hubbell Water Heater Manuals & Contact Information

Hydraulics Institute Heaters

Hydraulics encodes the date of manufacture as two digits of week and two of year in positions 1-4 of the serial number


Intertherm Water Heater Age Decoding Guide

Intertherm Water Heater Age Query: Hi, can you tell me the date an Intertherm water heater was made?

Model #IHMS960E4 - Serial #K07433029

Reply: best guess 1974. Details and contact information for Intertherm water heaters are


John Wood Water Heaters Age & Manuals JW Water Heaters


Lochinvar Water Heater Age & Manuals

Lochinvar sold water heaters under these brands: Lochinvar, Energy Saver water heaters, Golden Knight Water Heaters, and Knight Water Heaters.

YM123456 where Y encodes the year equating A to 1964 or 1984 or 2004 etc. and M encodes the month using A - N for January - December (the letters I O Q R U V are not used in these coding schemes)

For more about Lochinvar Water Heaters -


Marathon water heater age decoding from serial number

On Marathon water heaters the age is encoded as the first four digits of the serial number.


Contact Information for Marathon water heaters

Marathon water heaters are currently (2015) a Rheem product.

Montgomery Ward water heater serial numbers in format Ser# TE22780

Details and contact information for Wards water heaters are


Noritz Tankless Water Heater Age, Manuals, Error Codes


Optimus Water Heaters, Age, Manuals

This Optimus LP gas water heater is installed outside at Rio-Bec Dreams in Campeche, Yucatan, Mexcio.

Optimus LPG water heater in Mexico (C) Daniel Friedman at

Details, data tag photos, manual sources & citations in process. - Ed.

Paloma Water Heater Age Decode

Shown here, the data tag from a Paloma water heater and in a second image, a closer look at the Paloma water heater's serial number.

Paloma water heater data tag serial number encodes the date of manufacture (C) Daniel Friedman

[Click to enlarge any image]

Paloma water heater data tag details (C) Daniel Friedman

The serial number for this Paloma water heater is given as RMLN0109J000472

We decode this Paloma water heater serial number as RMLNMMYYP123456 or January 2009


Peter Cocks Ltd. Water Heaters, New Zealand

Peter Cocks Ltd. electric water heaters like the unit shown here are produce in Christchurch New Zealand. This is a low-pressure thermal storage water heater whose data tag indicates that the unit was manufactured in 1981.

[Click to enlarge any image]

Peter Cocks electric water heater, Christchurch New Zealand (C) Daniel Friedman at Peter Cocks electric water heater, Christchurch New Zealand (C) Daniel Friedman at

As you can see from our photo below, this Peter Cocks Ltd. electric water heater uses a single heating element.

Peter Cocks electric water heater, Christchurch New Zealand (C) Daniel Friedman at

Reliance Water Heater Manuals & Age Decoding

Reliance Water Heater company produces both gas and electric water heaters for which we give manuals and details now found at RELIANCE WATER HEATER AGE & MANUALS

Rheem water heater serial number decoding

MMYYX12345 where X is the plant code and 12345 a consecutive unique ID and of course MMYY are month and year.

We discuss Rheem-manufactured water heater date codes in detail at RHEEM WATER HEATERS & HEATER AGE

Richmond Water Heater Age Decoder

Richmond water heaters include the water heater's month and year of manufacture in the first four digits of the serial number as in this example.


Rinnai Furnaces & Water Heater Manuals, Error Codes, Age Decoder


Ruud Water Heater Age Decoding & manuals


Sears Kenmore Water Heater Age Decoding Guide


Below: Data Tag from a Sears Kenmore water heater. [Click to enlarge any image]

Sears Kenmore water heater data tag gives age encoded in serial number (C) Daniel Friedman at

The serial number onthis Sears Kenmore natural gas fired water heater is given as 1112A011137 and Model No. 153.331840

Current date code: Ser# YYMM123456 *using A.O. Smith water heater codes indicates that this Kenmore water heater was produced in December 2011.

State Water Heater Age Decoding Information

State water heaters, produced by State Industries, usually encode the age in the first three positions of the State water heater serial number as MYYnnnn

Where M is a one-letter month code, encoded corresponding to A = January through M = December and the second two digits are the numeric year.

See STATE WATER HEATER AGE for State water heater age determination, serial number decoding, and for State water heater manuals.

Superheat Water Heaters, New Zealand

Superheat electric water heaters like the one shown here are typically installed in a utility closet where space is so tight that we found it almost impossible to photograph the water heater's data tag.

Superheat electric water heater Christchurch New Zealand (C) Daniel Friedman Superheat electric water heater Christchurch New Zealand (C) Daniel Friedman

[Click to enlarge any image]

The data tag shows that this Superheat is a 300L water heater manufactured in 2009.

Takagi Water Heater Manuals, Troubleshooting Guides, Error Codes Contacts (also AO Smith)

See this separate article:


U.S. Craftsmaster Water Heater Age Decoder

U.S. Craftsmaster water heater age is usually encoded in the first four digits of the heater's serial number as in this example:


Where WW is the week number (weeks 01 through 52) and of course YY indicates the last two digits of the year of manufacture.

U.S. Craftsmaster is an indpendent water heater manufacturer whose heaters have been sold under the following trade names or brand names

Ace Water Heaters, Ace Hardware Water Heaters, American Hardware Water Heaters, America's Best Water Heaters, Apex Water Heaters, Aqua Temp Water Heaters, Aqua Therm Water Heaters, Aquamatic Water Heaters,

Best Water Heaters, Best Deluxe Water Heaters, Craftmaster Water Heaters, De-Limer Water Heaters, Deluxe, Eagle Water Heaters, The Earl's Energy Conservation Water Heater, The Earl's Energy Saver Plus Water Heaters, Envirotemp Water Heaters,

Four Most Water Heaters, Hotmaster Water Heaters, Hotstream Water Heaters, King-Kleen Water Heaters, King-Line Water Heaters, Master Plumber Water Heaters, Nationaline Water Heaters, Neptune Water Heaters,

Penquin Water Heaters, Prestige Water Heaters, Pro-Line Water Heaters, Pro-Line Plus Water Heaters, Quaker Water Heaters, Quick-Flo Water Heaters, Raywall Water Heaters, Revere Water Heaters, Riviera Water Heaters,

Sands Water Heaters, Sentinal Water Heaters, Sentinel Water Heaters, Servistar Water Heaters, Shamrock Water Heaters, Special Deluxe Water Heaters, Standard Water Heaters, Supereagle Water Heaters, Super-Flo Water Heaters, Supreme Water Heaters, Sure-Fire Water Heaters,

Thoro-Clean Water Heaters, True-Test Water Heaters, Tru Value Water Heaters, Tru Value Hardware Water Heaters, U.S. Craftmaster Water Heaters, U.S. Supply Water Heaters, Whirlpool Water Heaters, XCL Energy Saver Water Heaters

Watts Controls for Water Heaters

Watts S210-5 automatic thermostatic gas water heater shutoff valve - at InspectApedia.comDetails about automatic gas-shutoffs on gas water heaters are


[Click to enlarge any image]

Weil McLain Heater Age De-Coding Guide

Weil McLain Heater Age Query:  (Oct 25, 2012) carl said: how do you find an age of a Weil Mclain GV 3 Gold serial no cp 3406659

Reply: this looks like you have sent us a heating boiler brand and model number not a domestic water heater. Quoting product literature:

The Weil McLain GV boiler is a high efficiency, gas-fired direct vent water boiler with cast iron sections.

Using sealed combustion technology, the boiler reduces energy usage by eliminating air infiltration. The GV boiler is easy to install and service, and is useful for a wide variety of applications including residential, light commercial, multiple boilers, indirect-fired water heating, and radiant heating.

From Carson Dunlop Associates Associates Technical Reference Guide, the most complete HVAC and water heater age decoding guide I've got (provided courtesy of CDA), Weil McLain heating boiler serial numbers beginning with 34nnnn were manufactured between 1998 and 2000.

This article and comment page are for water heaters. For details on age determination for heating boilers & furances


Watch out: for other Weil McLain boiler numbers one needs to consult the Guide cited above, as the encoding of serial numbers does not afford a formulaic de-code procedure. For example Weil McLain boiler serial numbers beginning with 32nnnnn were made beginning in 1997.

Contact information for Weil McLain heating equipment

Westinghouse Water Heater Manuals & Contact Information

Whirlpool Water Heater Manuals & Contact Information

Williamson Water Heater Manuals

What Determines Water Heater Life?

Flooded Water Heater (C) Daniel Friedman

Home inspectors typically expect a generic water heater to last about ten years. However all of us have found 20 year old models still going strong, while on occasion a newer model fails early.

Details about water heater life expectancy: We have expanded and moved this topic


What are the Typical Terms of Water Heater Warranties

Type of water heater tank and water heater warranty - modern "glass lined" water tanks are coated to resist corrosion. The manufacturer's warranty is a clue to how long the company expects their water heater tank to last.

Typical water heater warranty periods for a water heater installed for use by a single family are 6-years, 9-years, or 12-years.

But beware: if the water heater tank leaks and fails before the end of the warranty period, if the system has not been properly installed or maintained the warranty may be void.

Water heater warranties typically indicate that the tank is warranted against leaks due to rust, corrosion, or chemical action of the water but the warranty will exclude warranty coverage for the geyser or water heater for

Water Heater Performance Data


Continue reading at WATER HEATER LIFE or select a topic from closely-related articles below, or see our complete INDEX to RELATED ARTICLES below.

Or see WATER HEATER AGE & MANUALS FAQs - questions & answers posted originally on this page.





Or see this

Article Series Contents


WATER HEATER AGE DECODING GUIDES - six methods for figuring out the age of a water heater - listed just below:


Or see WATER HEATER AGE & MANUALS FAQs - questions & answers posted originally at this article


For water pressure tank age or water storage tank age, see WATER TANK AGE DECODER

Suggested citation for this web page

WATER HEATER AGE & MANUALS at - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.


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Publisher - Daniel Friedman