Marathon MR85245

The MR85245 features 4500w elements and a tank capacity of 85 gallons. This model is perfect for a family of 6 to 7 with normal hot water demands. If you currently have an 85 gallon heater and it does not meet your hot water needs, you may want to look at the MR105245.

Featuring faster recovery times then its 3800w siblings, this model is perfect for newer homes with larger electrical capacity. If your home is older and has a smaller electrical panel you should look at the MR85238.

Marathon MR85245 Features:

  • Seamless, blow-molded, polybutene tank – impervious to rust and corrosion 
  • Multiple layers of filament wound fiberglass give the tank unmatched strength 
  • Polyurethane Envirofoam™ insulation helps reduce energy consumption 
  • The most energy efficient in its class 
  • Recessed drain valve is out of the way of brooms and scrubbers 
  • Tough molded polyethylene outer shell resists dents and scratches 
  • Bowl shaped bottom allows complete sediment draining 
  • High temperature polysulfone dip tubes 
  • All plastic tank eliminates the need for an anode rod 
  • Thermally fused element to protect tank against “dry-fire”; low watt, density for long life. 
  • Factory installed temperature and pressure relief valve 
  • Factory installed vacuum relief valve 
  • Inlet and outlet connections are 3/4″ NPT 
  • Water tight grommets keep out overhead moisture and condensation 

Buy the Marathon MR85245 Online Today!



Capacity: 85 Gallons
Element Size: 4500 Watts (240 Volts)
Tank Height: 70 1/4 Inches
Tank Diameter: 28 1/4 Inches
Weight: 134 lbs
Standards: Meets or exceeds ANSI standard and is UL listed. 
Energy Factor: .92 

Service Parts

Marathon offers a full line of service parts for their entire water heater line. The following service parts are available for this model: