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how old is my water heater?

Determine the age of your water heater by following this guide.

FAQs About Water Heater Age

Before you determine the age of your water heater, review some of the frequently asked questions when it comes to water heaters and the age of a water heater.

How old is my water heater?

When owning a water heater, it is important to know your water heater’s age in order to decide whether it is time to service or replace your water heater. If you have owned a water heater for a long time or just moved into a new home with a water heater you are not familiar with, then it would be a good idea to determine the age of your water heater.

How long do water heaters last?

A water heater can last anywhere between 8-12 years. Once you calculate the age of your water heater, you will then need to determine if the age of your water heater is past due for maintenance or replacement.

We will list the most popular brands in this water heater age guide so that you can determine your water heater’s age hassle free.

When is it time to replace a water heater?

Your water heater should last you many years and you should have a good idea of how much longer your water heater will last by reading the serial number to decipher the manufacture date of your water heater.

Keep in mind these 4 things when deciding the right time to replace your water heater:

  1. Water Heater Age: The general lifespan of a water heater is 8-12 years. This is why it is important to determine the age of your water heater and it is recommended to replace your water heater before it’s 12th birthday.
  2. Less Hot Water: If you are experiencing a decrease in hot water throughout your home, then it may be time to replace your water heater due to your water heater’s age.
  3. Higher Heating Bills: As a water heater grows older, it takes more energy to produce hot water. An increase in heating bills may be a good indication that your water heater is getting old and it’s time for a replacement.
  4. Corrosion: If your water heater is beginning to corrode, then this is means your water heater is significantly old and it is time for a replacement.

How do you determine the age of a water heater?

If you need to determine the age of your water heater, then follow the necessary steps below!

Check Your Water Heater’s Label

The first step you should take when determining a water heater’s age is checking for the manufacturer label on the side of the water heater.

On this label should be the installation date. This will give you the answer as to how old your water heater is.

However, if the label is missing, you may need to do a little more digging. You can use the serial number on your unit in order to determine the water heater age.

Each brand of water heaters has a similar. yet slightly different way of determining an age of a water heater.

Ages Based on Different Water Heater Brands

In order to determine the age of your water heater, it is important to know the brand of your water heater. We have compiled a list of the most popular water heater brands in order for you to determine the age of your water heater.

Click the brand of your water heater below:

 

AO Smith Water Heater Age

If your water heater is an AO Smith Water Heater, then you can use this information below to determine your AO Smith Water Heater Age.

For all models of AO Smith Water Heaters, the year and week of construction will be listed within the the serial number. However, the location of these numbers will be different for water heaters manufactured before 2008 and after 2008. Each serial number will consist of 10 numbers and letters, but you will only need to focus on the first four numbers in order to determine the AO Smith water heater age.

When looking at the serial number for your AO Smith water heater, the first four numbers will hold the information with the year and week the water heater was manufactured. Ignore any letter that may start the serial number.

See below for the correct calculations for each time period.

If your heater was built before 2008, the first two numbers will represent the year the water heater was built and the next two numbers represent the month.

– If your heater was built after 2008, the first two numbers will represent the year the water heater was built and the next two numbers represent the week.

Example: If the A.O. Smith serial number is 9808****** then the water heater was constructed in 1998 in the 8th week of the year.

It is important to know the age of your A.O. Smith water heater and when to replace an AO Smith Water Heater.

 

American Water Heaters Water Heater Age

If your water heater is an American Water Heater, then you can use the information below to determine American Water Heaters Heater Age.

To determine the age of your American Water Heaters water heater age, it is pretty simple. The serial number will consist of 10 digits. The first two numbers will tell you the year and the second two numbers will tell you the week of the year.

The following brands are sold under American Water Heaters and can be read the same way:

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, Raywall, Revere, Riveria, SABH, Sands, Sentinel, Service-Star, Shamrock, Special Deluxe, Standard, Super Eagle, Sure-Fire, Thoro-clean, Tru-Test, Tru Value, S. Supply, Whirlpool, XCL-Energy Saver

 

Bradford White Water Heater Age

Bradford Water Heater’s uses a key to display the year and month of the manufacture date. 

Here is the key for each letter that signifies 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

Here is the key for each letter that signifies a month… A = January, B = February, C = March, D = April, E = May, F = June, G = July, H = August, J = September, K = October, L = November, M = December

Example: If the Bradford White serial number is DG****** then the water heater was constructed in July 2007.

 

Rheem Water Heater Age

For most Rheem models, their construction dates are identified by the month, then the year on the serial number. These numbers are usually displaced as the first four numbers. In some cases, they may be displayed as the third to sixth numbers.

Example: If the Rheem serial number is 1110****** then the water heater was constructed in November 2010.

It is also important to note that Rheem produces water heaters under other brand names as well. These water heaters have serial numbers that can be read the same way. However, some of them may have the week of the year listed instead of the month.

The following water heaters are also produced by Rheem: Ruud, Richmond, Citation, Aqua Therm, Vista Therm, Energy Master, Vanguard, Cimarrom, Coast to Coast, Lowe’s, Servi-Star, True Value, ABS, Intertherm & Miller, Mainstream, Montgomery Ward, General Electric, and Professional.

 

Rinnai Water Heater Age

Rinnai Water Heaters carry two serial number patterns. On newer models, they use a similar key to the Bradford White water heaters that signify the month and year of the manufacture date of the Rinnai water heater.

The year of manufacture is represented by the first letter on the serial number. Here is the key… 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

The month of manufacture is represented by the second letter on the serial number. Here is the key… A = January, B = February, C = March, D = April, E = May, F = June, G = July, H = August, J = September, K = October, L = November, M = December

Example: If the Rinnai Water Heater serial number is JB. **-****** then the water heater was constructed in February 2017.

Water Heater Age & Replacing Your Water Heater

Unfortunately, water heaters do not last forever and there will come a time when your water heater age will grow old and it is time for a replacement. On average, a water heater’s lifespan is anywhere from 8 to 12 years.

Take a look at your water heater’s serial number to decipher your water heater’s age to determine if it is time for a water heater replacement. If you are trying to determine “How old is my water heater,” then use this guide to determine the water heater age of your water heater.

If you are having trouble determining the age of your water heater, then feel free to contact us today and we will gladly help you determine your water heater’s age based on it’s brand.

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We work with only the best brands, including Rinnai Water Heaters, Navien, AO Smith, Bradford White Water Heaters, and more.

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