How To Find Age Of Water Heater

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It can be difficult to predict how long your water heater will last — depending on the model and fuel source, its lifespan could be anywhere between 8 and 20 years. The typical conventional electric water heater has a lifespan of 10–15 years and is covered by a standard six-year warranty. If you are unsure of the age of your present unit, it is worthwhile to check to determine if it is approaching the end of its useful life. Prior planning is essential before your water heater fails, which can be inconvenient (at the very least) or catastrophic (at the worst) (at worst).

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Rheem and Ruud

MMYY****MM = Month in which the product was manufactured. YY stands for the year of manufacturing. For example, 1209D1234 represents the month of December 2009.

American and AO Smith

2008–present: YYWW******* YY stands for the year of manufacturing. WW is an abbreviation for Week of Manufacturing. For example, 16051234567 is the year 2016, the fifth week (early February) Pre-2008:*MYY****** M is the month in which the product was manufactured. A is for January | B is for February | C is for March | D is for April | E is for May | F is for June | G is for July | H is for August | J is for September | K is for October | L is for November | M is for December YY stands for the year of manufacturing.

Bradford White

Bradford White’s serial numbers are a little more difficult to decipher than others. The first letter of the serial number indicates the year of manufacturing, while the second letter indicates the month of manufacture. YM ******* Y stands for the year of manufacturing. The years A = 1984 or 2004 | B = 1985 or 2005 | C = 1986 or 2006 | D = 1987 or 2007 | E = 1988 or 2008 | F = 1989 or 2009 | G = 1990 or 2010 | H = 1991 or 2011 | J = 1992 or 2012 | K = 1993 or 2013 | L = 1994 or 2014 | M = 1995 or 2015 |

  • P = 1997 or 2018 |
  • T = 1999 or 2020 |
  • X = 2001 |
  • Z Please keep in mind that Bradford White water heaters produced 20 years apart will have the same letter designation on the label.
  • A represents January, B represents February, and C represents March.

Due for a replacement?

It’s a little trickier to figure out Bradford White’s serial numbers. The first letter of the serial number denotes the year of manufacture, and the second letter denotes the month. YM ******* Y stands for the year that the product was produced. The years A = 1984 or 2004 | B = 1985 or 2005 | C = 1986 or 2006 | D = 1987 or 2007 | E = 1988 or 2008 | F = 1989 or 2009 | G = 1990 or 2010 | H = 1991 or 2011 | J = 1992 or 2012 | K = 1993 or 2013 | L = 1994 or 2014 | M = 1995 or 2015 | N = 1996 or 2016 |

S = 1998 or 2018 |

W = 2000 |

Y = 2002 |

M stands for the month in which the product was produced. In the alphabetical order, A represents January, B represents February, and C represents March.

How do I know the age of my water heater?

Frequently Asked Questions/How do I find out how old my water heater is?

You can determine how old your residential water heater is by looking at and decoding data on the water heater’s label.

Locate the manufacturer’s label with the serial number on the side of your unit and write it down for future reference. In most cases, this sticker is placed around any warning labels as well as the energy guide. Check to see whether the sticker has a date on it indicating when it was installed. The serial number of your water heater should be written down if you don’t already have it since it generally denotes the year and month that the water heater was manufactured. Each manufacturer has a unique format, and you must decode the water heater serial number in order to utilize it.

Rheem or Ruud

As an example, the date 1209D1234 (MMYYPnnn) corresponds to December 2009. MM is an abbreviation for “month of manufacturing.” YY stands for the year of manufacturing. A sequential serial number for your individual unit is denoted by the letters P, which stands for plant identification code, and the letters NNNNN, which stands for a consecutive serial number for your particular unit.

AO Smith and American

In the example above, 9705123445 (YYWXXXXXXXXXXXXXXXXXXXXXXXXX) = 1997, 5th week (early February) YY = the month in which the product was manufactured WW denotes the year of manufacture.

Bradford White

In the example above, 9705123445 (YYWXXXXXXXXXXXXXXXXXXXXXXXX) = 1997, 5th week (early February) Manufacturer’s month code is YY. WWII = World War II was the year of production.

If you are in need of water heater replacement call Just Water Heaters at 520-488-0816 or complete our online request form.

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How to Determine the Age of a Water Heater

If to repair or replace your computer depends on your situation. You may also be concerned about whether you are still protected by the manufacturer’s guarantee. Hopefully, your water heater does not have as much age on it. For those of you who keep every purchase receipt for decades, you probably don’t need to read the rest of this article. Depending on whether you have a newer or older model, the water heater’s age may be plainly displayed on a manufacturer’s label that is fastened to the device.

All you need to know is the name of the company that made the water heater and its serial number (both found on the label affixed to the water heater).

You

  • Manuals from AO Smith, Rheem, and Bradford White, to name a few brands.

Manufacturer vs Brand

Please keep in mind that this content may contain affiliate links. This means that, at no additional cost to you, we may gain a small profit on purchases made via our links. In order to proceed, I’d want to bring out some of the distinctions between a water heater manufacturer and a water heater manufacturer brand. When it comes to water heaters, the manufacturer is the entity that takes raw materials or components and builds (or manufactures) them into finished products. Customers are sold (or branded) water heaters according to their brand, which is represented by the brand name.

Hundreds of different types of water heaters are produced by a small number of manufacturers and then sold under dozens of various brand names. For example, even if the water heater you purchased from Sears is labeled as “Kenmore,” it is still made by Rheem and not Kenmore.

So, how old IS my water heater?

Serial number lookup sections for each major water heater manufacturer may be found below in the sections below. Column one of each table has a list of all of the different brands that the firm produces, column two contains example serial numbers, and column three functions as a serial number decoder.

A.O. Smith Water Heater Age

Included Brands A.O. Smith Serial Numbers How to Decode
A.O. Smith GlascoteGSWPermaGlas Style 1 (current):1510 *******(10th week of 2015)Style 2 (pre-2008):* A07 *******(January, 2007) Style 1:Digits 1-2 are the year and digits 3-4 are the week of the year.Style 2: The second digit is the month (A-N, excluding I) so A=January and N=December. Digits 3-4 are the year.

Rheem Water Heater Age

Included Brands Rheem Serial Numbers How to Decode
RheemRuud Rheem/RuudRichmond Vista ThermCitationAqua ThermEnergy MasterVanguardCimarromCoast to CoastLowe’sServi-StarTrue ValueABSInterthermMillerMainstreamMontgomery WardGeneral ElectricProfessional Style 1:0811 ******(August, 2011)Style 2:* 3210 *****(32nd week of 2010)Style 3:**1599 ******(15th week of 1999)Style 4:**** 0608 ******(June, 2008)Style 5:09.04 -******(April, 2009) Style 1:Digits 1-2 are the month and digits 3-4 are the year.Style 2:Digits 2-3 are the week of the year and digits 4-5 are the year.Style 3:Digits 3-4 are the week of the year and digits 5-6 are the year.Style 4:Digits 5-6 are the month and digits 7-8 are the year.Style 5:Digits 1-2 are the year and digits 3-4 are the month (the sets of numbers are separated by a period)

Bradford White Water Heater Age

Included Brands Bradford White Serial Numbers How to Decode
Bradford White Jetglas EH *******(August, 2008)TB *******(February, 1999) 1st letter equals the year using this key:P = 2017|N = 2016|M = 2015L = 2014|K = 2013|J = 2012H = 2011|G = 2010|F = 2009E = 2008|D = 2007|C = 2006B = 2005|A = 2004|Z = 2003Y = 2002|X = 2001|W = 2000T = 1999|S = 1998|P = 1997 2nd letter equals the month using this key:A = January|B = February|C = MarchD = April|E = May|F = JuneG = July|H = August|J = SeptemberK = October|L = November|M = December

State Industries Water Heater Age

Included Brands State Ind. Serial Numbers How to Decode
State /KenmoreAceAmbassadorBarnettCenturyCrosleyEnergy StretcherFreedomFreedome/NipscoHardware HouseMaster Plumber/True5MissionNationalinePatriotPenfieldPresidentRegencyReliance The PlumberyThermo-Ki Style 1:1021 *******(21st week of 2010)Style 2:K06 *******(October, 2006)Style 3:* K06 *******(October, 2006) Style 1:Digits 1-2 are the year and digits 3-4 are the week of the year.Style 2:The 1st digit is the month of the year using the key below and digits 2-3 are the year.A = January|B = February|C = MarchD = April|E = May|F = JuneG = July|H = August|J = SeptemberK = October|L = November|M = DecemberStyle 3:Same as style 2 except it has an extra digit at the beginning.

American Water Heater Age

A.O. Smith acquired the company in 2001. Prior to it, the company produced water heaters for a plethora of various manufacturers.

Included Brands American Serial Numbers How to Decode
American Water Heaters AceAmerican HardwareBestBest DeluxeApexAqua TempAgua ThermAquamaticChampionCraftmasterDe-LimierDeluxeEagleEarl’s Energy SaverEnvirontempFour MostHotmasterHotstreamKing-CleenKing-lineMaster PlumberMor-Flo/AmericanNationalineNeptunePenquinPremierPrestigeProlineProline-PlusQuakerQuick-FloRaywallRevereRiveriaSABHSandsSentinelService-StarShamrockSpecial DeluxeStandardSuper EagleSure-FireThoro-cleanTru-TestTru ValueU.S. SupplyWhirlpool XCL-Energy Saver Style 1 (current):1510 *******(10th week of 2015)Style 2 (pre-2008):* A07 *******(January, 2007) Style 1:Digits 1-2 are the year and digits 3-4 are the week of the year.Style 2: The second digit is the month (A-N, excluding I) so A=January and N=December. Digits 3-4 are the year.

Lochinvar Water Heater Age

Included Brands Lochinvar Serial Numbers How to Decode
LochinvarEnergy SaverGolden KnightKnight EH *******(August, 2008)TB *******(February, 1999) 1st letter equals the year using this key:P = 2017|N = 2016|M = 2015L = 2014|K = 2013|J = 2012H = 2011|G = 2010|F = 2009E = 2008|D = 2007|C = 2006B = 2005|A = 2004|Z = 2003Y = 2002|X = 2001|W = 2000T = 1999|S = 1998|P = 1997 2nd letter equals the month using this key:A = January|B = February|C = MarchD = April|E = May|F = JuneG = July|H = August|J = SeptemberK = October|L = November|M = December

How to Find Water Heater Model Numbers

Finding the model number of your water heater might be difficult at times. However, all water heaters are equipped with a Rating Plate, which contains critical information such as the model and serial numbers, the name of the manufacturing company, the length of the warranty, the wattage of the elements installed (on electric models), the gallon capacity, the input BTU rating (on gas models), and other details.

Rheem Water Heater Model Numbers

The rating plate on new Rheem water heaters is simple to read and understand. It contains the date of manufacture, as well as information about the size and capacity of the device. On earlier models, you may tell how old your water heater is by deciphering the serial number on the water heater itself. It was made simple by some manufacturers, such as Rheem, who built in the months and years as part of the first four digits of the serial number. This Rheem water heater, for example, was manufactured in December of 1991, as shown in the photograph below (1291).

See also:  How Big Is A Tankless Water Heater

Let’s take a look at the above rating plate and decipher it: This water heater, model number 21V50-2, serial number 1291A39968, was manufactured in December of 1991 and has a capacity of 50 gallons and a BTU output of 36000 per hour.

Bradford White Model Numbers

The Bradford Whiterating plate is the most difficult to decipher out of all the plates in the collection. To determine the age of a Bradford White tank, you must first understand the coding system used by the company. The first letter of the serial number indicates the year of manufacturing, while the second letter indicates the month of manufacture. The decoding process is based on the following data structure: Year Decoder: G = 1990; H = 1991; J = 1992; K = 1993; L = 1994; M = 1995; N = 1996; P = 1997; S = 1998; T = 1999; W = 2000; X = 2001; Y = 2002; Z = 2003; A = 2004; B = 2005; C=2006; D=2007; G = 1990; H = 1991; J = 1992; K = 1993; L = 1994; M = 1995; N= 1996; P = 1997; S = 1998 Month decoder: A = January, B = February, C = March, D = April, E = May, F = June, G = July, H = August, J = September, K= October, L= November, M = December.

The tank with the rating plates on it was manufactured in June 2002.

American Water Heater Model Numbers

The year is listed first, followed by the week in which the tank was constructed, according to the American system. The tank in this example was constructed during the 17th week of 1998.

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  • The Pacific Northwest, including Seattle, Tacoma, and the South Sound and Snohomish and Skagit Counties
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Bradford White Water Heater age

The serial number of a Bradford White® water heater can be used to establish the date of production/manufacture or the age of the water heater(s). Bradford White® employs a letter cycle that rotates every 20 years (e.g., the letter “M” represents both 1995and2015 year of manufacture). Please keep in mind that it is not uncommon to come across a Bradford White® water heater that seems to be from any year indication on the outside. Another criterion that must be considered in order to precisely establish which 20-year cycle the letter may represent is the time span of the letter.

Both 1987 and 2007 are represented by the letter “D” in the photograph shown below. The ANSI code date shows that the product complies with ANSI Z21.10.1a-85. The year is 1985.

Serial number styles/formats found are:

Style 1:DG 6322957 Style 2:OA 822685 Style 3:DG 6322957 Style 4:OA 822685 (Unique computer error serial number beginning with the letter “O”). The year is represented by the color red; the month is represented by the color green; and the week is represented by the color blue.

Water Heater Age – How Old Is Your Water Heater?

In the case of a water heater, it is critical to understand the age of the water heater and to know when it is time to service or replace the water heater. In the event that you have had a water heater for a long period of time or have recently moved into a home with a water heater that you are unfamiliar with, it would be a good idea to determine the age of your water heater. SensibleDigs has put together an excellent post that covers all you need to know about determining the age of your water heater.

Here are some of the most important points from theSensibleDigsarticle on how to determine the age of your water heater.

Determining Water Heater Age

The installation date of a water heater is generally found on an information sticker that is attached directly to the water heater on newer types. When it comes to older models, you may have to delve a little further to figure out how old your water heater really is. The best place to start is by looking at the serial number on the back of your water heater, which is normally situated near the energy guide or warning labels on the water heater itself. The serial number indicates the month and year in which the building was constructed.

Decoding A Water Heater’s Serial Number To Find Construction Date

In order to determine the construction date and age of your water heater, you will need to know the brand of your water heater. See the list below for the most popular water heater brands, as well as instructions on how to decode the serial number of each model.

A.O. Smith Water Heater Age

The process of determining the age of an A.O. Smith water heater is rather simple. For both earlier and newer versions, A.O. Smith includes the year and week of production in the first four numbers of the serial number, which is the same for both. In the example above, if the water heater’s A.O. Smith serial number is 9808******, it means that it was built in 1998 during the eighth week of the year. It is critical to understand the age of your A.O. Smith water heater and when it is necessary to replace an AO Smith water heater.

Rheem Water Heater Age

Construction dates for most Rheem models are indicated on their serial numbers by the month followed by the year, as seen in the table below. These numerals are generally displaced as the first four numbers on a numbering system, though. Some of them may be displayed as the third to sixth numerals on the screen in some situations. For example, if the Rheem serial number is 1110******, this indicates that the water heater was built in November 2010.

Bradford Water Heater Age

In order to indicate the year and month of the manufacturer’s date, Bradford Water Heaters employ a key. Here is the key to each letter of the alphabet that represents a year. S = 2018, P = 2017, N = 2016, M = 2015, L = 2014, K = 2013, J = 2012, H = 2011, G = 2010, F = 2009, E = 2008, D = 2007, C = 2006, B = 2005, A = 2004, Z = 2003, Y = 2002, X = 2001, W = 2000, T = 1999, S = 1998, P = 1997, N = 1996, S = 1998, P = 1997, N = 1996, S = 1998, P = 1997, N = 1996, S = 1998 Here is the key to each letter of the alphabet that represents a month.

For example, if the Bradford White serial number is DG******, then the water heater was built in July 2007 according to the manufacturer.

Rinnai Water Heater Age

In order to show the year and month of manufacturing on Bradford Water Heaters, a key is used. Here is the key to each letter of the alphabet that represents a different year. S = 2018, P = 2017, N = 2016, M = 2015, L = 2014, K = 2013, J = 2012, H = 2011, G = 2010, F = 2009, E = 2008, D = 2007, C = 2006, B = 2005, A = 2004, Z = 2003, Y = 2002, X = 2001, W = 2000, T = 1999, S = 1998, P = 1997, N = 1996, S = 1998, P = 1997, N = 1996, S = 1998, P = 1997, N = 1996, S = 1998, For each letter that represents a month, the following is the key: Year A is represented by January, B is represented by February, C represents March, D represents April, E represents May, G represents July, H represents August, J represents September, L represents November, and M represents December.

A is represented by the letter A, B is represented by the letter B, and C is represented by the letter C.

When To Replace Your Water Heater

Your water heater should provide you with many years of service, and you should have a decent sense of how much further it will provide you with service by examining the serial number on your water heater to determine the date of production. When determining the appropriate time to replace your water heater, keep the following four considerations in mind:

  1. It is expected that your water heater will survive for many years, and you should have a decent sense of how much further it will last by examining the serial number on your water heater to determine when it was manufactured. When considering when to replace your water heater, keep the following four considerations in mind:

Water Heater AgeReplacing Your Water Heater

Unfortunately, water heaters do not live indefinitely, and there will come a point when your water heater will have reached the end of its useful life and it will be necessary to replace it. A water heater has an average lifespan of 10 to 15 years, depending on the model. Examine the serial number on your water heater to establish the age of your water heater and whether or not it is time to replace your water heater. If you are attempting to figure out “How old is my water heater,” you may use this guide to figure out how old your water heater is by following the instructions.

Please do not hesitate to contact us if you have any queries or want assistance in replacing your water heater.

How to Determine the Age of a Water Heater (Complete Guide)

Water heaters have an average lifespan of around ten years, however certain models may live up to twice as long if they are maintained properly. When your water heater begins to malfunction, you may have muddy or rusty water, as well as loud clanging noises from the heater. You may also experience a lack of hot water, or the water may heat up extremely slowly. Prior to your water heater failing, it is in your best advantage to have it replaced as soon as possible.

Once it fails, you’ll be without hot water for an extended period of time as you wait for repairs. In order to remain on top of replacement, you’ll need to know how old your water heater is so that you can figure out when it’s time to upgrade or replace it. This isn’t a very challenging assignment.

Read the Label

The quickest and most accurate way to determine the age of your water heater is to read the label. Granted, not every water heater is equipped with a label, but if yours does, it should be quite simple to determine when it was manufactured. Most manufacturer’s labels provide an installation date that is near enough to the production date that you may use it as a starting point for your calculations. You can figure out how old the heater is by counting back the number of years from the date of its installation.

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Decode the Serial Number

If your water heater does not have a label, or if the label does not include an installation date, you’ll need to decode the serial number rather than the model number. Each serial number gives the information necessary to establish the year and month in which the heater was manufactured. The main drawback is that deciphering the serial number might be a time-consuming process. Every water heater serial number would be OK if they all used the same date technique, however that is not the case at this time.

You should also be aware of the distinction between a manufacturer and a brand.

Brands are just the names of the companies that sell the things under their names.

Heaters

A.O. Smith and American Water Heaters

Brands that are included:

  • American hardware
  • Ace, Agua Therm, American hardware, Apex, Aqua Temp, Aquamatic, Best, Champion, Craftmaster, De-Limier, De-limier, Deluxe, Eagle, Earl’s Energy Saver, Environtemp, Four Most, Glascote, GSW, Hotmaster, Hotstream, King-Cleen, King-line, Master Plumber, Mor-Flo, Nationaline
  • The following brands are available: Neptune
  • Penquin
  • PermaGlas
  • Premier
  • Prestigfe
  • Proline
  • Quaker
  • Quick-Flo
  • Raywall
  • Revere
  • Riveria
  • SABH
  • Sands
  • Sentinel
  • Service-Star
  • Shamrock
  • Special Delux
  • Standard
  • Super Eagle
  • Surefire
  • Thoro-Clean
  • Tru Value
  • Tru Test
  • S. Supply
  • Whirlpool
  • XCL Energy Saver
  • XCL Energy Save

How to Decode

The first serial number style is applicable to models manufactured after 2008 and is still in use at the time of writing. The year is represented by the first two numbers. In this example, the number 17 denotes the year 2017. The following two digits reflect the day of the week. The number 14 indicates that the heater was constructed during the fourteenth week of the year.

Serial Number Style 2: *C05******* (March, 2005)

The second digit of this form of serial number, which was in use previous to 2008, is a letter that reflects the month and year in which the heater was constructed. The letters are arranged in alphabetical order with the months from A to N, with the letter I skipped. Consequently, the letters A through B are assigned to January; C is assigned to February; and N is assigned to December. The year of manufacturing is indicated by the third and fourth digits. In this example, the letter C indicates that the heater was constructed in March, while the number 05 indicates that it took place in 2005.

Rheem and Ruud

Brands that are included:

  • ABS, Aqua Therm, Cimarrom, Citation, Coast to Coast, Energy Master, General Electric, InterthermMiller, Lowe’s, Mainstream, and other companies
  • Montgomery Ward, Professional, Rheem, Richmond, Ruud, Servi-Star, True Value, Vanguard, and Vista Therm are some of the brands available.

How to Decode

The following brands are available: Montgomery Ward, Professional, Rheem, Richmond, Ruud, Servi-Star, True Value, Vanguard, and Vista Therm, among others.

Serial Number Style 2: *1608***** (16 thweek of 2008)

In this approach, the initial digit of the date is not included in the calculation. The heater’s birth year will be indicated by the second and third digits of the year, with the following two numbers indicating the week of the year in which the heater was born.

In this example, we can see that the numerals two and three add up to 16, while the digits four and five add up to 08, indicating that the heater was built in the 16th week of 2008.

Serial Number Style 3: **2898****** (28 thweek of 1998)

In the case of serial number style three, the first two numbers have absolutely nothing to do with the date of manufacturing. The third and fourth digits, on the other hand, signify the week in which the heater was constructed, while the next two digits denote the year. As you can see in our example, the numerals 2898, represented by digits 4-8, indicate that the heater was constructed during the 28th week in 1998.

Serial Number Style 4: ****0705****** (July, 2005)

In contrast to the other forms of serial numbers, none of the first four digits are utilized to indicate the date in this case. Rather, the digits 5-8 will be utilized to represent the numbers. The month will be represented by the numbers five and six, while the year will be represented by the numbers seven and eight. In this example, the heater was produced in July of 2005, as shown by the numbers five through eight of the serial number 0705.

Serial Number Style 5: 06.08****** (June, 2008)

This is the serial number style that is most straightforward to decipher. The first four digits reflect the date of production, with two digits for the year followed by two digits for the month, all separated by a period. The last four digits represent the date of manufacturing, with two digits for the month followed by two digits for the year. Our example shows the number 06.08, which may be decoded as June of 2008, with 06 signifying the month of June and the number 08 following the decimal indicating that 2008 was the year in which the item was produced.

Bradford White Water Heaters

Brands that are included:

How to Decode

Bradford White employs a difficult-to-understand serial number method that must be decoded. Only two characters are required, with the first letter denoting the year and the second letter indicating the month in which the heater was made. The letters A through M symbolize the months in a chronological order, with A representing January, B representing February, and so on, all the way down to M representing December. Even more difficult is figuring out how many years have passed. Each letter of the alphabet indicates two years that are separated by 20 years.

  • It goes on like this: A – 1984 or 2004
  • B – 1985 or 2005
  • C – 1986 or 2006
  • D – 1987 or 2007
  • E – 1988 or 2008.

You may follow this pattern all the way up to our current year of 2021, which is symbolized by the letter X on our calendar.

Conclusion

If you’re fortunate enough to discover a label on your water heater that has the date of installation printed on it, estimating the age of your water heater will be straightforward and straightforward. If, on the other hand, you need to decode the serial number of your heater in order to determine when it was manufactured, you’ll need to know how to decode the precise serial number that your heater possesses. There are a variety of different techniques for encoding the date of production into the serial number of a water heater; but, with the help of this guide, you should be able to determine when yours was built.

Image courtesy of nikkytok/Shutterstock.com

How Old Is My Water Heater?

The most recent update was made on September 28th, 2021. Water heaters are designed to last between 8 and 12 years before they need to be replaced. The installation date of your hot water heater is critical if you were not the original owner of your house and are unaware of when it was first installed.

Fortunately, this information is easily available and simple to locate on your hot water heater’s display panel. This article will provide you with step-by-step instructions to assist you in determining the age of your water heater and determining when it may be necessary to replace it.

Decoding serial numbers

On September 28th, 2021, the most recent update was made. Water heaters have an average lifespan of 8 to 12 years before they need to be replaced. If you are not the original owner of your property and are unaware of when your hot water heater was installed, it is critical that you find out this information. Fortunately, this information is easily available and straightforward to locate on your hot water heater’s display panel. This tutorial will provide you with step-by-step instructions to assist you in determining the age of your water heater and determining whether or not it is time to replace it.

Types of Serial Codes

  • There aren’t many water heater manufacturers who offer the date in such a distinct manner as Rheem. A few examples of common water heater manufacturers, how they list their serial numbers, and where you may get more information on serial numbers are shown below. Navien– based on the model of water heater, the serial code will be displayed in a different way than the others. In order to assist you in decoding your serial number, Navien provides a chart. Rinnai– in a manner similar to the preceding example, the date of manufacturing may be found in the first four numbers of the serial code of the manufacturer. The year is represented by the first two numerals, which are then followed by the month.

What if I still can’t find it?

If you are having trouble locating your water heater’s serial number, this information may be of assistance. A technician will be able to assist you in locating the serial number on your water heater unit and will also be able to assist you in determining the date that your water heater was manufactured.

Don’t forget maintenance

Always bear in mind that doing routine maintenance will assist to ensure that your water heating system operates for as long as feasible. Consult the information in our previous blog article to understand how to keep the water in your house hot while also helping to extend the life of your water heater for many more years.

Post navigation

Water heaters are not inexpensive, and purchasing a new one might represent a considerable financial commitment. Fortunately, if you get a dependable model from a reputable manufacturer and maintain it correctly, you can expect it to provide you with many years of service. However, it is possible that it will break down and require repair or even replacement – and if this occurs too soon, you will need to know the model number in order to determine if it is still covered by warranty. This tutorial will show you how to identify the age of your water heater in case you aren’t sure where to start looking.

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Different companies, same technique

The specifics of how to determine the age of your water heater will vary depending on the manufacturer of your device, but the concept is the same. Almost every water heater is equipped with a rating plate that carries information such as the name of the manufacturer, the model number, the wattage of the heating elements, the water heater’s capacity in gallons, and other pertinent information. The information presented changes depending on the type of water heater you have — for example, if you have a tank-style water heater, the information displayed will be different from the information displayed on a tankless water heater.

Even if the format varies from one organization to the next, it is not difficult to comprehend if you know how to read it.

Rheem water heater age

Rheem is an excellent firm to begin with. This firm is well-known for producing high-quality electric tankless water heaters as well as tankless gas water heaters, and the rating plates on models manufactured by this company are simple to read. Once you’ve discovered the rating plate on your Rheem water heater, you’ll need to look for the serial number, which will be made up of a combination of ten digits and letters. Take a look at the first four digits once you have discovered this. The first two digits reflect the month of production, whereas the second pair represents the year of manufacturing.

Example: If the first four numerals on the water heater are 1199, that means that it was manufactured in November of 1999. The number 11 represents the month of November, and the number 99 represents the year 1999. Rheem also manufactures water heaters that are energy efficient.

  • In addition to Ruud and Rheem/Ruud, there are several more manufacturers, such as: Richmond, Vista Therm, Citation, Aqua Therm, Energy Master, Vanguard, Cimarrom, and Coast to Coast. ABS and InterthermMiller are also available, as is True Value from Lowe’s and Servi-Star from True Value.

A.O. Smith water heater age

It can be a bit more harder to decipher A.O. Smith water heater rating plates, but if you know what to look for, it’s still a very simple process. The serial number will be made up of ten digits and letters, and you may figure out the date of manufacturing by looking for the first four numbers in the sequence of the numbers. A.O. Smith serial numbers begin with the year of manufacturing, followed by the month, thus if the first three numbers in the serial number are 9710, the date of manufacture was October 1997.

Smith also manufactures the Glascote and PermaGlas water heater brands, and their rating plates may be read in the same way as the A.O.

American Water Heaters water heater age

It’s a little more difficult to decipher A.O. Smith water heater rating plates, but if you know what to look for, it’s still a very simple process. The serial number will be made up of ten digits and letters, and the date of manufacturing may be determined by looking for the first four numbers in the series. A.O. Smith serial numbers begin with the year of manufacturing, followed by the month, thus if the first three numbers in a serial number are 9710, the date of manufacture was October 1997, for example.

Smith also manufactures the Glascote and PermaGlas water heater brands, and their rating plates may be read in the same way as the A.O.

  • Master Plumber, Mor-Flo/American, Nationaline, Neptune, Penquin, Premier, Prestige, Proline, Proline-Plus, Quaker, Quick-Flo, Raywall, Revere, Riveria, SABH, Sands, Sentinel, Service-Star, Shamrock and Special Deluxe are just a few of the brands available.

Bradford White water heater age

The situation is a little more difficult with Bradford White, because this manufacturer utilizes a letter in the serial number to indicate the year and a letter in the serial number to represent the month. This implies that you must be aware of the year and month that each letter represents, otherwise you will have no way of determining the age of the water heater. The year is represented by the first letter of the serial number – below is the key that informs you which year the first letter represents:

  • P = 2017, N = 2016, M = 2015, L = 2014, K = 2013, J = 2012, H = 2011, G = 2010, F = 2009, E = 2008, D = 2007, C = 2006, B = 2005, A = 2004
  • Z = 2003
  • Y = 2002
  • W = 2000
  • T = 1999
  • S = 1998
  • P = 1997
  • N = 1996
  • M = 1995
  • L = 1994
  • K = 1993
  • J = 1992
  • H = 1991
  • G = 1992
  • F = 1993
  • E = 1993
  • F =

The month is indicated by the second letter of the serial number; the following is the key to deciphering this information:

  • A = January
  • B = February
  • C = March
  • D = April
  • E = May
  • F = June
  • G = July
  • H = August
  • J = September
  • K = October
  • L = November
  • M = December
  • A = January
  • E

Because B represents for 2005 and H refers for August, you may deduce that a water heater with the serial number BH6511396 was manufactured in August of 2005 based on this information. Bradford White also manufactures water heaters that are sold under the Jetglas brand, and the serial numbers of these water heaters may be read in the same way as the serial numbers of the Bradford White water heaters.

State Water Heaters water heater age

State Water Heaters is a manufacturer of water heaters that are sold under a variety of trade names. The sort of serial number that you will discover on a water heater made by this firm may be classified into three different categories. With the first kind, the serial number will begin with four numerals at the beginning of the string. This time, the first two numbers represent the year and the second two numbers represent the week of the year.

This signifies that a water heater with the serial number 1210 was constructed in the tenth week of 2012, according to the manufacturer. The second form employs a letter to indicate the month, which is followed by a number that tells you what year we are talking about. The key is as follows:

  • A = January
  • B = February
  • C = March
  • D = April
  • E = May
  • F = June
  • G = July
  • H = August
  • J = September
  • K = October
  • L = November
  • M = December
  • A = January
  • E

A serial number beginning with C12, for example, would have been created in March of 2012, according to this definition. The third form is identical to the first two types, with the exception of the addition of a number before the letter. Just leave off the first digit when calculating the age and read the remainder in the same manner as the second kind. There are several more brand names under which State Water Heaters units are available for purchase:

  • Barnett, Century, Crosley (energy stretcher), Freedom (Freedome/Nipsco), Hardware House (hardware house), Kenmore (master plumber/true5), Mission (nationaline), Patriot (patriot), Penfield (president), Regency (reliance), The Plumbery (thermo-Ki), and Thermo-Ki.

Lochinvar water heater age

Lochinvar is another another company that employs letters to signify the years and months of the year and month of the month. Typically, the serial numbers for water heaters from the manufacturer begin with two letters, with the first representing the year and the second representing the month as the initial letters. Here’s the secret to remembering the years:

  • N=2016, M=2015, L=2014, K=2013, J=2012, H= 2011, G = 2010, F = 2009, E = 2008, D = 2007, C = 2006, B = 2005, A = 2004, Z=2003, Y = 2002, X = 2001, W= 2000, T= 1999, S= 1998, P= 1997, N=2016

And here’s the key to the months ahead:

  • A = January
  • B = February
  • C = March
  • D = April
  • E = May
  • F = June
  • G = July
  • H = August
  • J = September
  • K = October
  • L = November
  • M = December
  • A = January
  • E

Because A = 2004 and B = February, a serial number beginning with AB would have been created in February 2004, indicating that the number was created in February 2004. Lochinvar water heaters are also offered under the Energy Saver, Golden Knight, and Knight brand names, and the serial number on these units may be read in the same way as the serial number on the Lochinvar water heaters described above.

Check the warranty information

It is hard to list every single one of the world’s most renowned manufacturers and many well-known companies, therefore we have included some of the most well-known and well-known. However, almost every manufacturer employs a similar method, and all you need to know is how to read the serial number on the product you are purchasing. The best suggestion we can provide you if you have a heater that we haven’t listed is to go to the manufacturer’s website and seek up how to read the serial number there.

Find Age of Heater

Approximately 90% of our clients report that a leaky or non-functional water heater is the catalyst for their search for a replacement. Customers frequently inquire as to “how could I have realized that this water heater was ready to fail?” Actually, the solution is right in front of you if you just know where to look. One thing (besides from the fact that water is gushing all over your house) that you can readily determine whether it is time to replace your water heater is the age of the water heater.

Our customers frequently inquire as to “how could I have realized that this water heater was ready to fail?”

RHEEM / RUUD / GE

Water heaters from RHEEM, RUUD, and GE are labeled with the month followed by the year. You’ll see in the image below that the first four numbers of the serial number are “0902,” which shows that it was manufactured in September (the ninth month) of 2002.

BRADFORD WHITE

For water heaters made by RHEEM, Ruud, and GE, the month is followed by the year.

Notice that the first four numbers of the serial number are “0902,” which indicates that it was issued in September (the ninth month) of 2002, as shown in our illustration below.

In the picture below, you can see that this Bradford White water heater was manufactured in March of 2006.

The American Water Heater Company sells their products under a variety of brand names, including Craft Master, Whirlpool, and others. They utilize a “YEAR / WEEK” pattern to organize their information. The year is represented by the first two numbers, while the week of the year is represented by the second two digits. The heater in this photograph was constructed during the 45th week of 2005, as seen in the photograph.

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