The year of manufacture for Bradford White water heaters is encoded in the the serial number. Note: Older units may have additional letters before the 1st and 2nd numbers Bradford White X YYX77777 (1st and 2nd numbers of serial number indicate the year of manufacture) The year of manufacture for Apollo water heaters is encoded in the the serial number. Note: Older units may have additional letters before the 1st and 2nd numbers Apollo YY77777777777 (1st and 2nd numbers of serial number indicate the year of manufacture) YY777 77777 (1st and 2nd numbers of serial number indicate the year of manufacture) YY77X7777777 (1st and 2nd numbers of serial number indicate the year of manufacture) The year of manufacture for AO Smith water heaters is encoded in the the serial number. Y=year of manufacturer X=letter 7=numbers Their service life can be extended by replacing the heating elements and other components. Water Heaters typically have a 15-20 year life expectancy. When it comes to determining the life expectancy of a unit we are most interested in the year of manufacture which is the focus of this article. A lot of information can be included in the serial number including month of manufacture, day of manufacture, manufacture plant, type of unit and more. Manufacturers have been inconsistent over the years with their labeling which is why buyers should verify this information by following up with the manufacturer. By referencing the manufacturer below with the serial number the age of the equipment can be determined in most cases. Unfortunately most manufacturers of water heaters do not clearly state the manufacture year on the data plate or label but luckily the year of manufacture is typically coded in the serial number. This article is a quick reference guide for the most common manufacturers of water heaters.
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