Warranty & Registration Lookup
Register your Rheem product or verify your warranty terms and coverage.
Find a Pro
Put your water heater and heating and cooling system installation in good hands with a trustworthy, independent Rheem Pro.
Replace a Part
Find what you need to keep your Rheem equipment working perfectly.
Blogs
Read articles and industry news for homeowners and contractors.
Financing
Don’t let a limited budget keep you from getting the comfort equipment you need for your home or business.
FAQs
Get answers to all the most frequently asked questions (FAQs) about Heating, Cooling & Water Heating.
Find Rebates
Search for and find local rebates for your new Rheem heating and cooling solution.
Project Sizing Solutions
Application Consulting for Customizable Water Heating Solutions.
BIM/CAD Files
Browse and download BIM/CAD files for commercial heating and cooling solutions.
Financing
Explore financing options to help make your project more affordable.
Revit Files
Browse and download Revit files for commercial water solutions.
Replace a Part
Find what you need to keep your Rheem equipment working perfectly.
Who We Are
Learn more about Rheem, our history and our commitment to sustainability.
Sustainability
Learn about our commitment to doing good by our customers, our partners, our employees - and our planet.
Careers
Passionate, innovative thinkers work here, grow here and impact the next generation. We are driven to provide the perfect degree of comfort for homes and businesses.
Our Leadership
Find detailed profiles of our company's key executives, highlighting their professional backgrounds, expertise, and roles within the organization.
News Releases
Stay up to date with the latest news and press releases from Rheem Manufacturing and its family of brands.
Blogs
Read articles and industry news for homeowners and contractors.
svg-icon
Residential Products
svg-icon
HomeProductsResidentialWater HeatersMarathon Thermal Storage Tank

Marathon Thermal Storage Tank

MODEL MTS105245
United States
Lifetime Limited Tank Warranty
6-Year Limited Parts Warranty

Canada
Lifetime Limited Tank Warranty
6-Year Limited Parts Warranty
  • 50, 85 and 105 gallon capacities, 2 port and 3 port configurations
  • Specifically designed for installation as a thermal storage tank
  • Large water connections
  • Tank – impervious to rust, corrosion

SKUMTS105245
ModelMarathon Thermal Storage Tank
Height66.75"

Marathon® thermal storage tanks feature a lifetime limited tank warranty and a 6-year limited parts warranty*

Designed for Alternative Energy Applications

  • Specifically designed for installation as a thermal storage tank
  • Backup electrical element provides 40 gallons or more of heated water
  • Large water connections for lower pressure drop
Built to Last!
  • Seamless, blow-molded, polybutene tank – impervious to rust and corrosion
  • Titanium sheath elements for superior resistance to lime build-up
  • Multiple layers of filament wound fiberglass give the tank unmatched strength
  • Tough molded polyethylene outer shell resists dents and scratches
Designed for Easy installation
  • Lightweight
  • Water port fittings located at front of storage tank for convenient access
  • Full port, full flow brass drain valve for fast draining
  • Factory installed temperature and pressure relief valve and vacuum relief valve
Plus…
  • Thermally fused element provides protection against “dry-firing”
  • Bowl shaped bottom allows for complete sediment removal
  • Recessed drain valve is out of the way of brooms and scrubbers

DESCRIPTION 
MARATHON THERMAL STORAGE TANK MODELS
  GAL CAP MODEL NUMBER
  50 MTS50200
  85 MTS85200
  105 MTS105200
  85 MTS85245

105 MTS105245

85 MTS85345

105 MTS105345

 
50
CMTS50200
85 CMTS852000
105 CMTS105200

Available in Canada

United States
Lifetime Limited Tank Warranty
6-Year Limited Parts Warranty

Canada
Lifetime Limited Tank Warranty
6-Year Limited Parts Warranty