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Marathon Water Heater Marathon Water Heater
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  • Marathon Water Heater
    • Marathon Water Heater Marathon Water Heater

    Marathon Water Heater

    THE LAST WATER HEATERYOU’LL EVER NEED TO BUY

    Its award-winning construction makes the Rheem® Marathon® water heater the most durable electric water heater ever made. And its industry-best warranty makes it a smart purchase you can count on for years to come.

    Unmatched Durability

    Our innovative insulation process, seamless liner and tough outer jacket make Marathon the most durable in the business

    Simple Installation & Service

    Unique design allows one-person installation for fast service, lower costs and quick maintenance

    Lightweight Design

    Marathon’s lightweight tank is easier to maneuver and position, and features a bowl tank that drains completely

    Lifetime Tank Warranty

    Tank is built to last for as long as the homeowner owns their home, and backed by a lifetime warranty1

    Rheem KwikComfort Financing Picture

    Marathon & KwikComfort Deliver a Legacy of Savings

    Residential KwikComfort® Financing makes it easy and smart to enjoy hot water that lasts a lifetime. With low monthly payments, your Marathon Water Heater will only make a small impact on your monthly budget. And because it’s built to last, your Marathon will still be going strong long after it’s paid off.

    Unmatched Durability

    Explore the strength of Marathon’s features below:

    • Dry Fire Protection

      Advanced circuitry ensures that heating elements only turn on when surrounded by water, prolonging their life.
    • Innovative Insulation Process

      2.5″ polyurethane insulation reduces heat loss for greater energy efficiency.
    • Seamless Plastic Liner

      The Marathon water heater features a seamless, blow-molded plastic inner tank, so it won’t rust or corrode.
    • Tough Outer Jacket

      Multiple layers of filament wound fiberglass give the tank unmatched strength.

    Many Marathon Sizes to Fit Your Needs

    Picture of Rheem Marathon Point of Use Water Heater

    Point-of-Use Water Heater

    15- and 20-Gal. Capacities
    Browse Models

    Picture of a standard Rheem Marathon Water Heater

    Standard Water Heater

    30-, 40- and 50-Gal. Capacities
    Browse Models

    Picture of two Rheem Marathon thermal storage tank water heaters

    Thermal Storage Tank

    50-, 85- and 105-Gal. Capacities
    Browse Models

    Nothing Compares to Marathon Water Heaters

    See the comparison by clicking the appropriate tab below:

    Choose Category

    Tab Title here

      Marathon Plastic Tank Competitor Stainless Steel Tank
    Number of Replacement
    Units Allowed    		 Perpetual 1 Per Customer
    Warranty Restriction Due
    to Water Condition    		 No Yes
    Warranty Restriction Due
    to Water Temperature    		 No Yes
    Warranty Transferable1
    Low Product Weight
    Dry Fire Protection
    Element Titanium Stainless Steel
    Dent / Corrosion Resistant Jacket
    Saltwater-Resistant Jacket

      Marathon Plastic Tank Competitor Stainless Steel Tank
    Lifetime Savings on Water Heater
    Replacement    		 $1,1972 0
    Low Product Weight
    Dry Fire Protection
    Element Titanium Copper
    Anode Rod No Yes
    Corrosion Resistant
    Warranty1 Lifetime 6 Years
    Lifetime5 Water Heater Needed 1 8
    Dent / Corrosion Resistant Jacket
    Saltwater-Resistant Jacket

    More Information on Marathon Water Heaters

    Get a Rheem Marathon Water Heater Today

    Ready to enjoy a lifetime of hot water?