Marathon Series

Marathon™ non-metallic electric water heaters are durable, lightweight, and warranted not to leak as long as you own your home*

Features:

Non-metalic Tank Features
  • Seamless, blow-molded, polybutene tank – impervious to rust and corrosion
  • Multiple layers of filament wound fiberglass give the tank unmatched strength
  • Polyurethane insulation helps reduce energy consumption
  • Recessed drain valve is out of the way brooms and scrubbers
  • High temperature polysulfone dip tube
  • Tough molded polyethylene outer shell resists dents, scratches, and salt air
Efficiency
  • .90 - .94 EF
  • Well insulated for reduced standby heat loss
  • Pipe wrap energy saving kit included to achieve maximum energy savings
Performance
  • FHR: 52-104 gallons, based on gallon capacity
  • Recovery rate: 20 gallons GPH at a 90 degree rise
  • Capacity & Dimensions
  • 40, 50, 85, 105 Gallon tall models and a 50 gallon short
Easy Installation & Service
  • Marathon’s lightweight tank is easier to maneuver and position. Bowl shaped tank bottom drains completely.
Plus…
  • Thermally fused upper element provides protection against dry-firing – titanium lower element for superior resistance to lime build-up
  • Full-flow, brass drain valve
  • Temperature and pressure relief valve
  • Standard replacement parts
Warranty
  • Lifetime limited warranty on tank and 6 years on parts*


    Marathon Series Models
    DESCRIPTION
      TYPE GAL CAP. MODEL NUMBER

    ELEMENTS

      TALL
    40 MR40245
        50 MR50245
     
    85 MR85245
        105 MR105245
      SHORT 50 MSR50245
             
    TALL 40 CMR40233  240V, 3.0KW
      40  CMR40245  240V, 4.5KW
      50 CMR50230  240V, 3.0KW
      50 CMR50238  240V, 3.8KW
      50 CMR50245  240V, 4.5KW
      75  CMR75238 240V, 3.8KW
      75  CMR75245  240V, 4.5KW
      85  CMR85245  240V, 4.5KW
      105  CMR105230  240V, 3.0KW
      105  CMR105245  240V, 4,5KW
    SHORT 50  CMSR50230  240V, 4.5KW
      50  CMSR50245  240V, 4.5KW

     
    Available in Canada only

  • The most durable electric water heater ever made
  • High efficiency design and a lightweight tank that won’t corrode
  • 40, 50, 85 and 105 gallon capacities
  • Seamless polybutene tank – impervious to rust and corrosion

Documents

Marathon Brochure
Marathon Heavy Duty Spec Sheet
Marathon Spec Sheet
Marathon Spec Sheet (Canada)
Marathon Use and Care Manual
Marathon Use and Care Manual (Canada)
EnergyMiser Gamma UL CSA

Warranties

United States
Lifetime Limited Tank Warranty

6-Year Limited Parts Warranty

Canada
Lifetime Limited Tank Warranty

6-Year Limited Parts Warranty