Rheem serial number lookup can be found by looking at types of Rheem water heater. The warranty is based on manufacture and usually the warranty code listed in the serial number of the Rheem water heater. Before I tell you how to look up the serial number, let’s take a look at the Rheem water heater first.
Rheem Water Heater
Rheem Company has been around for about 100 years, producing high-quality water heaters. Each Rheem water heater has a different length warranty, starting from six years warranty to fifteen years warranty (the top-line in the Rheem water heater industry); all of which is Energy-Star certified.

Maybe we might think that the water heater’s age can only be known if they install it. But we can know the Rheem water heater age by reading the serial number, which we can find on the back of the body water heater.
The 6-year warranty
The six-year warranty Rheem water heater does not mean that your water heater will only last for six years. The water heater can reach a life span of 8 years if you properly maintain the model. It is the basic model of Rheem water heater that has a 6-year warranty on parts and tanks. Although it is basic, the model is a fantastic water heater.
The company also gives a 1-year labor warranty. The six-year warranty needs annual maintenance to drain the tank to prevent harmful mineral dumps from forming and damaging the storage tank’s glass lining.
The 10-year warranty
This water heater is an advance of the previous model equipped with a self-cleaning system and saves more energy. Aside from having a 10-year warranty, the water heater also has a 1-year labor warranty, and the life span of the water heater is to be expected around 10 years. No wonder that this Rheem water heater is very popular.
The 15-year warranty
This is by no mean the most advance of the three. It has higher energy efficiency, a self-cleaning system, metal and brass parts, and additional corrosion prevention materials (anode rod). The anode rod is installed to prevent corrosion and glass lining crack. The warranty is 15-year long with a 1-year labor warranty.
Locating the Serial Number
The serial number identification on the Rheem water heater usually has ten digits, for example, 0898G01213. The first two digits are the month of the manufacture, followed by the year shown by the next two digits.
The letter is the plant line code, and the rest digits are the serial number. By looking at the serial number, you can know your water heater’s age and confirm the water heater warranty limitation.

You can do the Rheem serial number lookup by determining your water heater’s type first, whether it is a tank-type or tankless type. In the tank type, the model code and the water heater serial number are on the front of the water heater.
If you have the tankless type, the Rheem water heater serial number is located on the water heater’s front or right-hand side.
To verify your warranty’s limitation, you have to know the date of the manufacture and the code listed in the number by doing a Rheem serial number lookup.