50 Gallon Marathon Solar Water Heater

50 Gallon Marathon Solar Water Heater

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Marathon 50 Gallon Multi-Port Thermal Storage Tank (no elements no coils)

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SKU: StorMaxx-MS-050. Category: .

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Product Description

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Product Details & Specifications

Capacity 50 Gallons
Diameter 23.5"
Height 62.75"
Dry Weight 100 lbs
Insulation Material None
Insulation Thickness N/A
Number of Heat Exchanger Coils None
Heat Exchanger Coil Material N/A
Number of Circulation Ports 2

Marathon 50 Gallon Multi-Port Thermal Storage Tank (no elements or coils included)

Rheem Marathon™ Thermal Storage Tanks are specifically designed to provide high efficiency and low operating costs for alternative energy applications. The storage tanks are designed with large water connections conveniently located in the front of the unit for easier installation. The thick polyurethane foam on the Marathon™ Thermal Storage Tanks offer excellent insulation giving the most energy savings than other storage tanks. The multiport design can be used as a buffer tank or add heating elements to serve as backup to alternative energy sources. Because the models are built on the award winning Marathon™ chassis, it has the strength and durability you deserve and the limited LIFETIME warranty you expect. These features make the Rheem Marathon™ Thermal Storage Tanks the perfect storage tank whether used with solar water heating, geothermal heat pumps or indirect water heating (hydronic) applications. Two-port thermal storage tanks are available now. Click below for the specifications.

66 3/4″ tall, 1 1/4″ side ports, 3/4″ top port

Lifetime Limited TankWarranty*  6-Year Limited PartsWarranty*

  • Specifically designed for installation as a thermal storage tank for solar, geothermal, heat pump and indirect water heating
  • Large, front water connections for lower pressure drop in alternative energy applications
  • Collector feed and return fittings located at front of storage tank for convenient access
  • Seamless, blow-molded, polybutene tank – impervious to rust and corrosion
  • Multiple layers of filament wound fiberglass give the tank unmatched strength
  • Tough molded polyethylene outer shell resists dents and scratches
  • Full port, full flow brass drain valve for fast draining
  • Recessed drain valve is out of the way of brooms and scrubbers
  • Bowl shaped bottom allows for complete sediment removal
  • High temperature polysulfone dip tube
  • All plastic tank eliminates the need for an anode rod
  • Factory installed temperature and pressure relief valve
  • Factory installed vacuum relief valve


  • Polybutene tank
  • Filament wound fiberglass outer tank
  • Titanium sheath elements
  • High Temperature polysulfone dip tubes
  • Polyurethane Environfoam™ insulation (CFC and HCFC free)


  • 7 years limited warranty – on tank and coil heat exchanger
  • 3 years limited warranty – on tank and coil heat exchanger in all commercial installations

Need Assistance?
If you have questions need help or simply feel uncomfortable placing your order online feel free to contact the product representative at 1-800-786-0329.

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