State Water Heater Manufacture Date

State water heaters have the manufacture date listed in the serial number.

State water heater manufacture date.

Serial 1 st 4 digits. Where m is a one letter month code encoded corresponding to a january through m december and the second two digits are the numeric year. This would fall under the american water heater manufacturer where it gets rebranded as a whirlpool. Some manufacturers including rheem made it easy by incorporating the month and year built into the first 4 digits of the serial number.

It includes the manufacture date as well as information on the size and capacity. Older tanks prior to 2004 will use the second and third number listed. 1 st 2 nd number year. Johnwood gsw moffat superflue medal.

3 rd 4 th number month. On older models you can determine the age of your unit by decoding the water heater serial number. This tank was manufactured on the 24th week of 2009. So in your case the 27th week of 2009.

The first two digits are the year and the second two are the week of the year. 8901xxx made in the year 1989 in the first month january. Digits 1 2 of the s n are the year and digits 3 4 are the week of the year. Serial a02134562 means the tank was manufactured in 2002.