How to find and read your Rheem water heating serial number? If the label is missing, or the installation date is not listed, you can use the serial number to determine the age of your unit. How can I tell how old my hot water heater is?Ĭheck for a manufacturer label on the side of your water heater - this should include the installation date.

The “year of” is the first two digits followed by the two digit week of the year. How do you read a serial number on a American Water Heater?Īmerican Water Heater Company, manufacturer of 52 separate brands of water heaters, uses a 10-digit serial number with a year/week code in the first four digits of the serial number. Starting in 2010, the first two digits represent year, and the next two digits represent week. From 2002 to 2009 the first digit represents the year. It consists of at least 3 or 4 digits at the beginning of the serial number. This Trane (American Standard) style began use in 2002. By the way, look for the data plate of older Rheem water heaters on the top of the water heater instead of the side. Newer Rheem water heaters, like the one with the label below, make it easy for you: the manufacture date is stated to the right of the serial number. Where is the date on a Rheem water heater? Do water heaters have serial numbers?īut, all water heaters have a Rating Plate that lists important data such as the model and serial numbers, manufacturing company’s name, length of warranty, wattage of elements installed (on electric models), gallon capacity, input BTU rating (gas models), and more. The first two numbers represent the month of manufacture while the second pair show the year of manufacture.

Once you have found this, look at the first four numbers. With a Rheem water heater, once you have located the rating plate, you need to find the serial number, which will be made up of 10 numbers and letters. How do you read a Rheem hot water heater serial number?

How to read rheem serial number