How To Tell Age Of Water Heater

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It might be difficult to predict how long your water heater will survive – depending on the type and fuel source, its lifespan could be anywhere from 8 and 20 years. The typical traditional electric water heater has a lifespan of 10–15 years and is covered by a normal six-year guarantee. 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 breaks, which may be annoying (at the very least) or devastating (at the worst) (at worst).

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It is possible to ascertain the age of your device by using the serial number if your unit’s label is missing or the installation date is not indicated on the label.

Inspect your water heater for the manufacturer’s name, and then use the following guide to establish the age of your appliance:

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

Manufacturer’s month (MMYY****MM) Manufacturer’s year of production is denoted with YY. Take, for instance, the number 1209D1234 which represents December 2009.

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 is for January |
  • C is for March |
  • E is for May |
  • G is for July |
  • J is for September |
  • L is for November |
  • Is the manufacturer of your water heater not listed above?

Due for a replacement?

In the event that it is time to replace your old water heater, consider upgrading to a hybrid electric heat pump water heater instead. In addition to saving up to $300 a year on power expenses for a three-person home, hybrid electric water heaters are covered by a 10-year warranty as a matter of standard practice.

Many utilities also provide installation rebates; you may find out if yours does here. Learn more about the product and locate a store near you. When it comes to water heater efficiency, a greater energy factor means a more efficient water heater.

How do I know the age of my water heater?

Frequently Asked Questions/How can 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 item and write it down for future reference. In most cases, this sticker is placed around any warning labels as well as the energy guidance. 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

To illustrate, the month of December 2009 is designated as 1209D1234 (MMYYPnnn). MM is an abbreviation for the month in which the product was created. YY stands for the year in which the product was manufactured. A sequential serial number for your specific unit is denoted by the letters P, which stands for plant identification code, and the letters NNNNN, which stands for consecutive serial number.

Bradford White

B=2005 in the case of BH6511396 (YMXXXXXXXXXXXXXXXXX) H=August The Bradford White rating plate is the most difficult to interpret out of all of the options available. 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 format (which is also illustrated in the chart below): YEAR DECORATOR: 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; A = 2004; B=2005, C=2006, D=2007 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.

Please keep in mind that Bradford White employs a 20-year letter designation cycle in serial numbers, as stated in the table below.

To see a larger version of this photograph, click here.

If your Tucson water heater is more than ten years old, you should consider replacing it before it breaks and causes damage to your home or other property.

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

Admin2014-09-19T17:54:59-07:00 a link to the page’s load

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).

Alternatively, you may go through your handbook to gain a general estimate of its age depending on the year it was first published. The following links will take you to online versions of the majority of models from the three most popular brands:

  • 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.

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

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.

  1. Both 1987 and 2007 are represented by the letter “D” in the photograph shown below.
  2. The year 1985 marks the modification of ANSI Z21.10.1a.
  3. 1.
  4. 2.

The presence of other factors or clues, such as the physical appearance of the item, dates on the building or health department (authority having jurisdictionAHJ) inspection tag or sticker, service tags (if present), the age of the structure it is installed in, and common sense, must be relied upon in the absence of the listed ANSI year revision.

Serial number styles/formats found are:

From the serial number, it is possible to identify the date of production/manufacture or the age of the Bradford White® water heater(s). Using a revolving 20-year letter cycle, Bradford White® creates a unique look (e.g., the letter “M” represents both 1995and2015 year of manufacture). We would like to point out that it is typical to come across a Bradford White® water heater that seems to be from any year indication on the outside. There are a number of other characteristics that must be considered in order to appropriately establish which 20-year cycle the letter represents.

  • The letter “D” symbolizes both 1987 and 2007 in the picture sample shown below.
  • The ANSI Z21.10.1a standard was revised in 1985.
  • It is impossible for this water heater to have been built before 1985.
  • As opposed to 2007, this water heater is more likely to have been constructed in 1987 (within 6-8 years after the 1985 code modification), which indicates that it was manufactured within 6-8 years of the code revision.

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.

See also:  How To Clean Out 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

Rinnai water heaters are identified by two different serial number patterns. When it comes to later models, they employ a key system similar to that used by Bradford White water heaters, which indicates the month and year in which the Rinnai water heater was manufactured. The year of manufacturing is denoted by the first letter of the serial number on the piece of equipment. Here’s where it all comes together. A = 2009, B = 2010, C = 2011, D = 2012, E = 2013, F = 2014, G = 2015, H = 2016, J = 2017, K = 2018, L = 2019, M = 2020, N = 2021, P = 2022, R = 2023, S = 2024, T = 2025, W = 2026, X = 2027, Y = 2028, Z = 2029, A = 2009, B = 2010, C = 2011, D = 2012, E = 2013, F = 2014, G = 2015, The second letter of the serial number represents the month in which the item 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, and M is for December.

**-****** After that, in February 2017, the water heater was built.

When To Replace Your Water Heater

Rinnai water heaters are identified by two different serial number configurations. When it comes to later models, they employ a key system similar to that used by Bradford White water heaters, which indicates the month and year in which the Rinnai water heater was built. When you look at a serial number, the first letter represents the year it was manufactured. Here’s where it all starts. X = 2027, Y = 2028, Z = 2029, A= 2009; B= 2010, C= 2011, D= 2012; E= 2013, F= 2014; G = 2015; H = 2016, J= 2017, K = 2018, L= 2019, M = 2020; N = 2021; P = 2022; R = 2023; S = 2024; T = 2025; W = 2020; X= 2027, Y = 2028; Z = 2029; A = 2009; B = 2010, C = Using the second letter of the serial number, you may determine the month of manufacturing.

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.

An illustration would be the following: If the Rinnai water heater’s serial number is JB, then ****** After that, the water heater was built in February of 2017.

  1. Typical Water Heater Lifespan: A water heater has a typical lifespan of 10-15 years. As a result, it is essential to know the age of your water heater, and it is advised that you replace your water heater before it reaches the age of 15
  2. Having Less Hot Water: If you are seeing a reduction in the amount of hot water available throughout your house, it may be time to replace your water heater
  3. Increased Heating Bills: As a water heater ages, it requires more energy to create hot water, resulting in higher heating bills. It’s possible that an increase in your heating expenditures is a sign that your water heater is growing old and it’s time to replace it
  4. In the case of corroding water heaters, this indicates that they are much older and that it is time to replace them.

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.

For more in-depth information, read the entire article from SensibleDigs.com. Please do not hesitate to contact us if you have any queries or want assistance in replacing your water heater. If you have any issues about your AO Smith warranty outside of New York, please contact 1-800-527-1953.

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 manufacturing, 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 certain 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 produced in December of 1991, as shown in the photograph below (1291).

  • Let’s take a look at the above rating plate and decipher it: This is a natural gas water heater, model number 21V50-2, serial number 1291A39968, produced in December of 1991, with a capacity of 50 gallons and a BTU output of 36000 per hour.
  • The additional information you’ll find on this page is intended for service technicians and shouldn’t be required by the ordinary homeowner.
  • This 50-gallon electric tank was constructed in August of 1984 and was fitted with elements rated at 4000 watts.
  • This 50-gallon electric tank was constructed in August of 1984 and was fitted with elements rated at 4000 watts.
  • Their method of deciphering the date is a little different.
  • The information on the AO Smith plate is a little more difficult to locate, but it is there nevertheless!

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.

This is a 40 gallon electric water heater with the model number MI40L6DS13, which was built in June of 2002 and is still in good condition.

It’s important to note that the “Maximum Watts” is 4000, which indicates that the tank was designed to function in the “non-simultaneous” mode, which implies that only one element would be powered at a time (standard for residential water heaters).

It is meant to function with a maximum water pressure of 150 PSI, however it has been manufacturer tested to a maximum of 300 PSI for your safety before being shipped.

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.

Fast Water Heater currently services the below areas. If you didn’t find what you’re looking for, give us a call and we’ll get your questions answered fast!

  • The Pacific Northwest, including Seattle, Tacoma, and the South Sound and Snohomish and Skagit Counties
  • Oregon, including the greaterPortland area, Vancouver, and south down to Salem and Eugene
  • The Bay Area, including the East Bay, San Jose, Napa, Sonoma, and Marin Counties, Monterey County, Santa Cruz County, andSan Francisco Water Heater
  • Southern California, including Orange County, Ventura County, San Bernadinothe Inland Empire, and

How Can I Tell How Old My Water Heater Is?

If your water heater is not heating the water as it should, is leaking, or is producing unusual noises, it is possible that you have an issue that needs to be addressed. Unfortunatelly, most household appliances aren’t built to last forever, but if you can identify the manufacturer, model number, and year of manufacture of your appliance, you may be able to fix it. Some water heaters are still protected by the original manufacturer’s warranty, which is an added bonus. If you keep meticulous records of your home transactions and receipts, you may not need to seek for a model and serial number at all.

Fortunately, many water heaters have some of the most important information printed on a label that is attached to the side of the device, making it easier to find.

Different Manufacturers – Same Technique

The method for determining the age of your water heater varies slightly depending on the brand of the device, but the premise is the same across all manufacturers. A rating plate will be affixed to nearly every water heater, however it may be located in a different location on some models. The information on the plate will tell you the name of the manufacturer, the model number, the capacity of the tank (if it is a tank heater), the wattage of the heating elements, and the year the item was manufactured.

How Old is My Water Heater?

Identifying the manufacturer of your water heater is the first step in determining the age of your water heater. Fortunately, the name of the maker should be prominently displayed on the packaging. After that, you may proceed to determining the unit’s age. Here’s how you can figure it out using a few of the major manufacturers in the industry:

See also:  How To Install Expansion Tank On Water Heater

Rheem and A.0. Smith Water Heater Age

Identifying the manufacturer of your water heater is the first step in determining the age of the appliance. However, the producer should be clearly identified on the packaging. After that, you may proceed to determining the age of the unit in question. That may be determined by consulting with a couple of the leading manufacturers:

Bradford White Water Heater Age

When it comes to determining the age of its water heaters, Bradford White requires you to read code. The serial number will begin with two letters and will be followed by a number. Its first letter denotes the year of manufacturing, and its second, the month of manufacture. The most recent production codes may be found here.

American Water Heater Age

American Water Heater aims to make it as simple as possible for you to read their labels and determine when their products were made. One of these devices has a serial number that is also ten digits long.

The first two digits indicate the year of manufacturing, while the second two indicate when week of the year it was manufactured. As an example, a serial number that begins with 1220 indicates that the equipment was manufactured during the 20th week of 2012.

Need Water Heater Repair or Replacement?

Contact us if you need assistance with a water heater brand that isn’t listed here, or check out NACHI’s serial number decoder for more information. Keep in mind that your water heater may still be covered by the manufacturer’s warranty at this point. If you want assistance with the repair or replacement of your equipment, wish to negotiate an upgrade, or simply require answers to a few concerns, please contact us. We’ll see to it that you’re taken care of as soon as possible!

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.

This isn’t a very difficult procedure, but you do need to know what to look for, which is exactly what we’ll cover in this post.

Read the Label

Generally speaking, water heaters have a lifespan of roughly ten years, however certain models may last up to twice that long if maintained properly. Symptoms of a failing water heater include muddy or rust-colored bathing water, obnoxious clanging noises from the heater, and the inability to obtain sufficient hot water, or the inability to heat the water quickly enough. Prior to your water heater failing, it is in your best interests to get it replaced as soon as possible. Once it fails, you’ll be without hot water for an extended period of time while you wait for repairs to be completed.

The procedure is not difficult, but you must be aware of the signs to watch for, which is what we will describe in this post.

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.

Water heaters for a variety of brands might be produced by a same manufacturer. The serial numbers of heaters made by various manufacturers but by the same manufacturer will be the same, assuming that they are from the same time period.

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 month is represented by the first two digits, and the year is represented by the next two digits in this example. In this example, the number 10 indicates that the heater was produced in October, and the number 12 indicates that the heater was manufactured in 2012.

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)

The first two digits of a serial number style three have nothing to do with the date of manufacturing. In contrast, the third and fourth numerals denote the week in which the heater was constructed, while the next two digits denote the year. Using our example, the numbers 2898 as digits 4-8 indicate that the heater was constructed during week 28 of 1998, as can be seen in the table below.

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. More information may be found at: How Much Does It Cost to Install a Water Heater?

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

The most accurate approach to establish the age of your water heater is to look at the serial number on the tank. All water heaters will be labeled with a serial number that will be located on the outside of the device. Tank-style hot water heaters and tankless water heater systems are equally affected by this rule. Serial numbers will most likely be a mix of digits and letters in most cases. It is possible to ascertain the age of your water heater unit with the help of some water heater manufacturers, such as Rheem, who make this process simple.

When you examine the 9-digit serial code of a Rheem water heater, you will see that the first four numbers of the serial number correspond to the date of production of the water heater.

According to this scenario, the water heater would have been constructed in January of this year.

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.

See also:  Tankless Water Heater How Does It Work

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

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.

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.

It is important to remember that it is not a question of “if” a tank style water heater would leak, but rather a question of “when.” An oil tank heater located in a closet, above carpet, on the third floor, or anywhere else should be changed after 6-8 years, regardless of whether or not it is displaying indications of wear and tear.

However, although water heaters may and do endure for a longer period of time than the average life expectancy, a prudent homeowner will not wait until there is problem before replacing an old heater.

The “Rating Plate” has the information you’re looking for.

In order to determine the date of production, you only need to be aware of the format that each manufacturer use.

Although there are few exceptions, the first few digits of the serial number will almost always indicate the date of manufacturing, unless otherwise specified. Find your water heater’s manufacturer in the list below to find out how old it is:f

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

It is necessary for you to utilize the “decoder” information provided by BRADFORD WHITE in order to establish the age. They rotate the year of manufacturing using a 20-year letter designation rotation system. With the serial number, the first letter identifies the year of manufacturing, and the second letter specifies when month it was manufactured. Make a note of the fact that heaters made 20 years apart have the same first-year identification (for example, A = 1984 and 2004). Year designations are as follows: A = 2004, B = 2005, C = 2006, D = 2007, E = 1988, F = 1989, 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.

Month designations are as follows: A = January, B = February, C = March, D = April, E = May, F = June, G = July, H = August, J = September, K = October, L = November, and M = December.

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.

How to Determine the Age of Your Water Heater

A variety of brand names, such as Craft Master, Whirlpool, and others, are used to sell the products of the American Water Heater Company. “YEAR / WEEK” is the format that they employ. The year is represented by the first two numbers, while the week of the year is represented by the second two. This heater was built in the 45th week of 2005, as seen by the photograph.

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.

If you want a sneak peek at what you should be searching for, have a look at this video before continuing on – however keep in mind that each water heater’s rating plate will be somewhat different from the one seen here.

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.

Rheem also manufactures water heaters that are offered under a variety of other brands.

  • 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

The rating plates on American water heaters are easy to read. You will see that they are made up of ten numbers, with the first two of them representing the year and the second two representing what week it is in the year. In this case, the item with a serial number beginning with 9835 would have been manufactured during the 35th week of 1998. American Water Heaters is a manufacturer of water heaters that are offered under a variety of different brand names. The following brands are also made by American Water Heaters and may be read in the same way as the names of the previous brands:

  • Ace, American Hardware, Best, Best Deluxe, Apex, Aqua Temp, Agua Therm, Aquamatic, Champion, Craftmaster, De-Limier, Deluxe, Eagle, Earl’s Energy Saver, Environtemp, Four Most, Hotmaster, Hotstream, King-Cleen, King-line, Master Plumber, Mor-Flo/American, Nationaline, Neptune, Penquin, Premier, Prestige, Proline, Proline-Plus, Quaker, Quick-Flo

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:

  • 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 in their products. In order to determine the age of the water heater, you must know what year and month each letter represents. Otherwise, you will have no method of determining its age. Because the first letter of a serial number reflects the year, below is the key that informs you which year the first letter represents:

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 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.

It will ensure that you have the right knowledge on how to identify the age of your water heater when it comes time to replace it.

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