Rheem Marathon 50-Gallon Polybutene Tank
Model Number: MR50245
The only Rheem with a lifetime tank warranty — built for Nassau County hard water.
Technical Specifications
0.92
UEF Rating
67
1st Hr Rating (gal)
50
Tank Capacity (gal)
Key Features
Seamless polybutene tank
Lifetime tank warranty
0.92 UEF
20-year tank-only warranty available
Pros & Cons
Pros
- Lifetime tank warranty — never rusts
- Polybutene tank perfect for Long Island hard water
- No anode rod required
- Lighter than steel tanks
Cons
- Electric only — no gas option
- Higher upfront cost than steel tanks
- Slower recovery than gas
Best For
Long-term homeowners frustrated with hard-water tank failures
Warranty Snapshot
Tank: Lifetime
Parts: 6 years
Labor: 1 year
Register equipment with the manufacturer after installation to preserve coverage. We handle registration on Home+ installs.
Expert Review
The Marathon is the answer for homeowners tired of replacing rusted tanks every 8–10 years thanks to Long Island hard water. Its seamless polybutene tank cannot rust or corrode, and the lifetime tank warranty backs it up. Best fit: all-electric homes, vacation homes, or anyone who plans to stay 15+ years.
Frequently Asked Questions
Ready to Install the Marathon 50-Gal Lifetime?
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