![]() **-****** then the water heater was constructed in February 2017. 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 = DecemberĮxample: If the Rinnai Water Heater serial number is JB. The month of manufacture is represented by the second letter on the serial number. ![]() The year of manufacture is represented by the first letter on the serial number. 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. Rinnai Water Heaters carry two serial number patterns. 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 = DecemberĮxample: If the Bradford White serial number is DG****** then the water heater was constructed in July 2007. In some cases, they may be displayed as the third to sixth numbers.Įxample: If the Rheem serial number is 1110****** then the water heater was constructed in November 2010.īradford Water Heater’s uses a key to display the year and month of the manufacture date. ![]() These numbers are usually displaced as the first four numbers. Smith water heater and when to replace an AO Smith Water Heater.įor most Rheem models, their construction dates are identified by the month, then the year on the serial number. It is important to know the age of your A.O. Smith serial number is 9808****** then the water heater was constructed in 1998 in the 8th week of the year. Smith states the year and week of construction within the first four numbers of the serial number.Įxample: If the A.O. Smith water heater is pretty straight forward. See below for the most popular brands of water heaters and how to decode the serial number of each brand.ĭetermining the age an A.O. You will need to know your water heater’s brand in order to decipher the construction date and age of the water heater. This can be a little tricky because different manufacturing companies use different patterns or formulas when displaying this date on the serial number.ĭecoding A Water Heater’s Serial Number To Find Construction Date The serial number displays the month and year of construction. The best place to start is by looking at your water heater’s serial number that is usually located near the energy guide or warning labels on the water heater. With older models, you may have to dig a litter deeper to understand the age of your water heater. ![]() With newer models, the installation date of the water heater is usually located on the information sticker that is right on the water heater. Here are some highlights from the SensibleDigs article on deciding your water heater age. To read the full article, click here to learn more about the age of your water heater. SensibleDigs has created a great article on everything you need to know in order to determine your water heater age. If you have owned a water heater for a long time or just moved to a house with a water heater you are not familiar with, then it would be a good idea to figure out your water heater’s age. When owning a water heater, it is important to know the water heater age and when it is time to service or replace your water heater.
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