Marathon Series electric water heaters offer these advantages

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  • It's the most durable water heater made, with a warranty to match
  • Tank comes complete with a factory installed vacuum relief valve, ¾" brass tee and ¾" brass nipple for easy, professional installations.
  • Replaceable brass drain valve
  • All wiring run in conduit for easy control wiring
  • Seamless blow molded polybutene tank with no anode rod required for a corrosion free life
  • High temperature, commercial-grade diptubes for greater durability
  • The filament wound fiberglass outer tank is designed to be more flexible and withstand more pressure than conventional tanks
  • Our unique high temperature dip tube is offset from the concave bottom, creating a "whirlpool effect" which helps prevent sediment build-up
  • Every tank includes 4' of pipe insulation for even greater savings.

 

Marathon Series Products

Marathon Series Residential Electric Water Heaters

Marathon Series Residential Electric Water Heaters

Rheem Marathon Series 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. Titanium lower and copper upper 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. Rheem Marathon Series lifetime electric water heaters are designed primarily for Residential use providing years of hot water for you and your family. View Product Page
Marathon Series 'Point-of-Use' Electric Water Heaters

Marathon Series 'Point-of-Use' Electric Water Heaters

Rheem Marathon Series lifetime electric point-of-use water heaters feature the same high-efficiency design as the Marathon Series lifetime electric water heaters, but in smaller gallon capacities. These models share the same features as the larger units for strong, durable water heaters. And, they share the same limited LIFETIME warranty. The point-of-use models have recessed drain valves that keep out of the way of brooms and scrubbers. Unique to the Marathon Series water heaters are water tight grommets that keep out overhead moisture and condensation. These features are perfect for water heaters that fit underneath counters in restaurants, small offices or lavatories. View Product Page
Marathon Series Eclipse Electric Water Heaters

Marathon Series Eclipse Commercial Electric Water Heaters

Eclipse™ electric commercial water heaters are the longest lasting, most versatile water heaters designed to provide hot water where applications require moderate quantities. Seven variations of voltage and phase; four element locations; three element watt choices; and two stages of element operation prove the flexibility of this product. Flexibility is needed to meet many commercial applications such as retail stores, small offices, restaurants or any location where a moderate amount of hot water is required without sacrificing strength. The Eclipse™ electric water heaters have the BEST warranty for commercial products, a limited 10-year warranty on the tank and 1-year warranty on parts. View Product Page
Marathon Series 'Multi-Port' Thermal Storage Tanks

Marathon Series 'Multi-Port' Thermal Storage Tanks

Rheem Marathon Series Thermal Storage Tanks are specifically designed to provide high efficiency and low operating costs for alternative energy applications. The storage tanks are designed with large water connections conveniently located in the front of the unit for easier installation. The thick polyurethane foam on the Marathon Series Thermal Storage Tanks offer excellent insulation giving a high energy savings compared to other storage tanks. The multiport design can be used as a buffer tank, adding heating elements to serve as backup to alternative energy sources. Because the models are built on the award winning Marathon Series chassis, it has the strength and durability you deserve and the limited LIFETIME warranty you expect. These features make the Rheem Marathon Series Thermal Storage Tanks the perfect storage tank whether used with solar water heating, geothermal heat pumps or indirect water heating (hydronic) applications. Two-port thermal storage tanks are available now. View Product Page

Marathon Products

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Marathon Heavy Duty Series
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Marathon Series
  • Available in 40, 50, 85 and 105 US Gallons
  • Most durable water heater
  • High Efficiency design, lightweight tank
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Marathon Series
  • The most durable electric water heater ever made
  • High efficiency design and a lightweight tank that won’t corrode
  • 40, 50, 85 and 105 gallon capacities
  • Seamless polybutene tank – impervious to rust and corrosion
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Marathon Point-of-Use Series
  • Featuring the same unique design as the Marathon, but in smaller capacities
  • Ideal for condos, cabins and light-duty commercial applications
  • 15 and 20 gallon capacities
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Marathon Thermal Storage Tank Series
(Not Available in Canada)
  • 50, 85 and 105 gallon capacities, 2 port and 3 port configurations
  • Specifically designed for installation as a thermal storage tank
  • Large water connections
  • Tank – impervious to rust, corrosion

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Eclipse Series
  • Exclusive 10-year limited tank warranty
  • 85 and 105 gallon capacities
  • Inputs from 12, 18 and 24 KW
  • 208, 240, 277 and 480 voltages, single or three phase
  • Polybutene tank design – no anode rods