Marathon MR50245

The MR50245 features 4500w elements and a tank size of 50 gallons. This unit is perfect for a family of 3 to 4 with normal hot water demands.

The 4500w elements allow for a quicker recovery time after supplying hot water. It does NOT affect the efficiency of the unit. If your home is of newer construction and has a larger electrical panel and you meet the hot water demand requirements above, this unit is a perfect match.

If your electrical system cannot handle the extra load needed by a model with 4500w elements then you should check out the MR50238

Marathon MR50245 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 MR50245 Online Today!



Capacity: 50 Gallons
Element Size: 4500 Watts (240 Volts)
Tank Height: 66 3/4 Inches
Tank Diameter: 23 1/2 Inches
Weight: 100 lbs
Standards: Meets or exceeds ANSI standard and is UL listed. 
First Hour Rating: 61 Gallons 
Energy Factor: .94 

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: