Water heater age by serial number
Pick the brand on the rating plate. Each page decodes that manufacturer’s published date code and says what the serial can’t tell you.
- Bradford WhiteDecode the two-letter date code at the start of a Bradford White serial number. The letters give the year and month the water heater was made.
- A. O. Smith, State, AmericanRead the year and week of manufacture from an A. O. Smith, State, American, Reliance or U.S. Craftmaster water heater serial number.
- WhirlpoolWhirlpool-brand water heaters are made under license by American Water Heater. See what the serial number shows and how sure that reading is.
- Rheem and RuudDecode Rheem, Ruud and Richmond water heater serial numbers in both the older month-year layout and the plant-week-year layout used since 2012.
- LochinvarRead the build date from a Lochinvar tank water heater serial number, in the two-letter layout used until 2011 and the 11-character layout since.