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Marathon 40 Gallon Electric Water Heater with Limited Lifetime Warranty

Model # MR40245C

Marathon 40 Gallon Electric Water Heater with Limited Lifetime Warranty

Model # MR40245C
UEF 0.92
Gallons 40
Warranty LLW
  • The most durable electric water heater ever made
  • High efficiency design and a lightweight tank that won't corrode
  • Seamless polybutene tank impervious to rust and corrosion
  • 30, 40, 50, 85and 100 gallon capacities


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

Non-metallic Tank Features:

  • Seamless, blow-molded, polybutenetank impervious to rust andcorrosion
  • Multiple layers of filament woundfiberglass give the tank unmatchedstrength
  • Polyurethane insulation helps reduceenergy consumption
  • Recessed drain valve is out of the waybrooms and scrubbers
  • High temperature polysulfone dip tube
  • Tough molded polyethylene outer shellresists dents, scratches, and salt air


  • .90 - .92 UEF
  • Well insulated for reduced standbyheat loss
  • Pipe wrap energy saving kit includedto achieve maximum energy savings


  • FHR: 37 - 83 gallons, depending onmodel
  • Recovery: 21 GPH at a 90 F rise

Easy Installation & Service

  • Marathons lightweight tank is easierto maneuver and position. Bowlshaped tank bottom drainscompletely.
  • Bowl shaped tank bottom allowscomplete sediment draining
  • Water tight grommets keep out overheadmoisture and condensation


  • Thermally fused upper elementprovides protection against dry-firing
  • Titanium lower element for superiorresistance to lime build-up
  • Full-flow, brass drain valve
  • Temperature and pressure relief valve
  • Low Lead compliant
  • Standard replacement parts

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