Marathon MR75238

Featuring 3800w elements and a 75 gallon tank, the MR75238 is perfect for a family of 5 to 6 with normal hot water demands. Due to its smaller wattage elements, this model can be installed in older construction homes with smaller electrical panels.

If your home is newer with a modern electrical panel and you want slightly quicker recovery times, check out the MR75245 as it features 4500w elements.

Marathon MR75238 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 



Capacity: 75 Gallons
Element Size: 3800 Watts (240 Volts)
Tank Height: 58 5/8 Inches
Tank Diameter: 28 1/4 Inches
Weight: 127 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: