Rheem MTS105200

105 Gallon Tall Non-Metallic Thermal Storage Tank Residential

Item # BCI2143106   |   Model # MTS105200   |  Marathon Collection

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Marathon Collection Residential Non-Metallic Thermal Storage Tank with 105 Gallon Capacity

Are you working with alternative energy applications such as solar, geothermal and indirect heating? Are you looking for a thermal storage tank to make it complete? Rheem went to work specifically designing for such an application and the Marathon thermal storage tank is the result. Not only is it designed for alternative energy applications, it is designed for easy installation and to last. The tank is lightweight making it easy to maneuver and position. Water port fittings on the front allow convenient access. The tank bottom is bowl shaped, allowing complete sediment removal. By choosing to make the tank out of seamless, blow-molded, polybutene, Rheem made it impervious to rust and corrosion. By using multiple layers of filament wound fiberglass they gave the tank unmatched strength. With a tough molded polyethylene outer shell they made a product that resists dents and scratches. Rheem included a full port, full flow brass drain valve for fast draining. Built to last, Rheem stands behind the Marathon thermal storage tank with a lifetime limited tank warranty and a 6 year limited parts warranty.


  • Non-metallic polybutene tank
  • Unmatched tank strength from layers of filament wound fiberglass
  • Recessed brass drain valve
  • Tough polyethylene outer shell
  • Full port, full flow brass drain valve
  • Temperature and pressure relief valve is factory installed
  • Vacuum relief valve factory installed


  • Tank Capacity: 105 Gallons
  • Warranty: Lifetime Limited Tank - 6 Year Limited Parts

Rheem has been manufacturing water heaters since the 1930's, with coast to coast distribution by 1936. Their product offerings cover commercial and residential heating, cooling, solar water heating systems, conventional storage-style water heaters, tankless water heaters, replacement parts and accessories. Rheem's manufacturing facilities are ISO 9001 certified, with four facilities in the United States. Choose an industry leader that is respected for reliability. Choose Rheem.

Additional Rheem Links

This Rheem item can also be referenced by the following color/finish specific model #:

  • Rheem MTS105200

*Discontinued model or finish

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