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Read our privacy policyThe Rheem Marathon 40 gal. Short 4500/4500-Watt Elements Non Metallic Lifetime Electric Tank Water Heater is a Rheem Marathon non-metallic electric tank water heater built around a rust-resistant polybutene tank. It is designed for long service life in residential applications where corrosion resistance is a major priority.
Rheem Marathon literature emphasizes seamless blow-molded tank construction, fiberglass reinforcement, electric element heating, and no sacrificial anode rod. The listed gallon size and tall or short cabinet format should be matched to the installation space.
This product includes a manufacturer’s limited warranty. Verify voltage, phase, element wattage, breaker sizing, plumbing connections, installation location, and local code requirements before installation.