Rheem

Rheem water heating: residential gas and electric tanks, gas and electric tankless, commercial electric and gas, point-of-use heaters, heat pump models, plus elements, conversion kits, anode rods and replacement parts.

Rheem's residential range spans atmospheric, direct vent, power direct vent and condensing. That vent classification is the decision that governs a replacement: an atmospheric unit draws combustion air from the room and vents by natural draft, while a direct-vent unit brings air in and exhaust out through a sealed pipe. Swapping between them means new venting, and often new combustion-air provision.

Warranty length is the shorthand for build quality across the line — 3, 6, 8 and 12 year models differ mainly in anode mass and tank lining, not in the burner. A 12-year tank in hard water can still be outlasted by a 6-year tank whose anode gets replaced.

Most residential connections are 3/4" MIP; commercial runs 1-1/2" and 2". Fuel types stocked include natural gas, propane, convertible and electric.

Shopping by type? See Rheem 40 gallon water heaters, gas and electric, and Rheem tankless water heaters.

Popular in this collection: Rheem 80 Gallon Light Duty Commercial Electric, Rheem 40 Gallon Professional Classic Electric, Rheem AP23528 Duct Diverter.

Frequently asked questions

How do I find the right Rheem water heater part?

Order from the model and serial number on the rating plate on the side of the tank. Rheem parts such as gas valves, burners and thermostats are matched to the model, and sometimes to a serial range within it.

How old is my Rheem water heater?

On most Rheem water heaters the first four digits of the serial number, after any letters, are the month and year of manufacture. For example, a serial number starting 0519 was made in May 2019.

Which replacement element fits my Rheem electric water heater?

Match the voltage and wattage on the rating plate, and the element style: screw-in or flange. A higher wattage element than the plate allows can overload the circuit. See Rheem 40 gallon water heaters and commercial electric water heaters.