Marathon Water Heaters Brochure

How It Differs From Other Water Heaters
  • Easy to Install and Service: The Rheem Marathon is lightweight for one-person, low-cost installation and resourcefully designed for quick maintenance, should problems arise – It’s bowl-shaped tank bottom drains completely and requires no anode rod replacement
  • Designed for Durability and Cleanliness: The Marathon’s seamless, blow-molded polybutene inner tank will not rust or corrode like its metallic counterparts, while the outer tank resists dents, scratches and salt air – This tank provides the best durability, the ability to withstand the harshest environments and eliminates smelly water due to chemical reactions
  • Saves You Money: Save on your energy bill with the Marathon’s 2.5 inches of polyurethane foam insulation – It minimizes stand-by heat loss, allowing only 5-degree (F) loss in 24 hours
  • Yours for Life: Many homeowners replace a water heater every 10 years – Instead, the Rheem Marathon’s durable design is backed by a free warranty upgrade from 10 years to lifetime, if you register online*
  • Built to Last:
    • Brass union connections provide easy installation or re-installation
    • Polyurethane insulation reduces energy consumption
    • Rugged polyethylene jacket resists shipping damage and won't rust
    • Oversize element covers for easy sediment removal
    • Recessed brass drain valve
    • Factory installed T&P relief valve and vacuum relief valve
    • Water-tight outer jacket delivers dependable service in challenging environments
    • Thermally fused upper element provides protection against dry-firing
    • Titanium lower element means superior resistance to lime build-up*
    • Bowl-shaped bottom for easier, more complete draining
    • *MHD models offer titanium upper and lower elements

*Tanks manufactured after November 15, 2015 must be registered for Rheem to honor the warranty. Second, the Warranty is transferable to a second owner but from that point, the tank is only covered under the Rheem Warranty for 10 years from date of transfer.

The Rheem® Marathon® Electric Water Heater

The Rheem Marathon is the water heater of a lifetime. Because it’s the only water heater you’ll need in your home’s lifetime.

The Rheem Marathon Vs. Competitor's Stainless Steel Tank

Feature Comparison Plastic Tank (Marathon) Competitor's Stainless Steel Tank
Number of Replacement Units Allowed Perpetual 1 allowed per customer
Warranty Restriction due to Water Condition No Yes
Warranty Restriction due to Water Temperature No Yes
Warranty Transferable** Yes No
Low Product Weight Yes No
Dry Fire Protection Yes No
Element Titanium Stainless Steel
Dent / Corrosion Resistant Jacket Yes No
Salt Water Resistant Jacket Yes No

The Rheem Marathon Vs. Rheem Standard Electric Steel Tank

Feature Comparison Plastic Tank (Marathon) Competitor's Stainless Steel Tank
Lifetime Savings on Water Heater Replacement $5,744*** 0
Low Product Weight Yes No
Dry Fire Protection Yes No
Element Titanium Copper
Anode Rod Needed No Yes
Corrosion Resistant Yes No
Warranty* Lifetime 6 years
Water Heaters Needed Over Lifetime 1 16****
Dent / Corrosion Resistant Jacket Yes No
Salt Water Resistant Jacket Yes No

*Warranty is provided to original customer in a residential application after online product registration is complete. Registration must be completed within 90 days of installation. See warranty certificate for complete information.

**See warranty certificate for complete information

***Based on comparison for a 50-gallon standard residential electric water heater at an average price point of $359 multiplied by number of water heaters needed for replacement

****Lifetime for U.S. defined as 99 years and replacing a standard electric water heater with a 6-year warranty