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Marathon Water Heaters

Marathon® lifetime electric water heaters feature a high-efficiency design with a lightweight tank that won't corrode. It is the most durable electric water heater ever made. The unique, award winning construction of the seamless plastic tank means a product that is stronger, of higher quality and longer lasting. An abundance of CFC and HCFC free foam insulation from top to bottom results in the most energy savings than any other water heater in its class. Stainless steel elements resist lime buildup and operate more efficiently. These features, along with the BEST warranty, mean the BEST value for an electric water heater in the industry! The tank has a limited LIFETIME warranty and the parts have a six year warranty. Marathon’s lifetime electric water heaters are designed primarily for Residential use providing years of hot water for you and your family. 

Marathon Water Heaters feature:

  • Seamless molded non-metallic inner tank-won’t rust or corrode
  • Temperature and pressure relief valves
  • Fill tube-high temperature polysulfone withstands thermal storage and high temperature commercial applications
  • Thermally fused upper heating element
  • Tough molded polyethylene outer jacket-resists dents and scratches during transit, installation and beyond
  • 2-1/2” Envirofoam® insulation-energy saving and made without CFC’s and HCFC’s
  • Long lasting stainless steel lower element
  • Recessed brass drain valve

Lifetime tank* and six year parts warranty!

Marathon lifetime water heaters are available in the following sizes:

15, 20, 30, 40, 50, 75, 85, and 105 gallons

*For residential applications, the tank is warranted not to leak: “for as long as you own your home.” If the home is sold, the warranty converts to 15 years from the date of manufacture.

Click here for Authorized Marathon Dealers & Price List

Marathon Water Heaters