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Marathon 40 Gal. Tall 4500-Watt Lifetime Electric Water Heater
  • Rheem
  • Model MR40245
  • Internet #205931673
  • Store SO SKU #

Marathon 40 Gal. Tall 4500-Watt Lifetime Electric Water Heater

$121924 /each
Discontinued Model:

Model # MR40245

Internet #202584259

Store SO SKU #607988

Marathon 40 gal. Tall 4500-Watt Lifetime Electric Water Heater

Discontinued Marathon

40 gal. Tall 4500-Watt Lifetime Electric Water Heater

  • Provides ample hot water for households with 2-4 people
  • Make sure it fits: measure your space to ensure dimensions fit
  • Same-day installation in most areas. Call 1-855-400-2552 by noon.

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Product Overview

The 40 gal. Tall Marathon lifetime electric water heaters provides hot water with peace of mind. Plastic tank eliminates the need for anode rod and prevents smelly water. Rigid foam insulation covers entire tank for maximum efficiency. Bowl-shaped tank bottom drains completely for easy service and sediment removal Lower titanium heating element for superior resistance to lime buildup. Factory installed temperature and pressure relief valve offers added protection. Lifetime limited warranty on tank and 6 year limited warranty on parts. Meets or exceeds National Appliance Energy Conservation Act (NAECA) requirements.

  • Call 1-855-650-2786 before noon for same-day installation in most areas
  • 40 gal. tank provides ample hot water for a 1 -2 bath home
  • Electric water heater is easy to maintain
  • Non-metallic tank and jacket resists corrosion
  • Thermally-fused upper element protects against dry firing
  • Designed for easy replacement of your existing water heater
  • Call 1-855-400-2552 before noon for same-day service in most areas, or Visit our Water Heater Installation page for more information.
  • Meets 2015 NAECA Standards

Info & Guides

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Name Performance 40 Gal. Tall 6 Year 4500/4500-Watt Elements Electric Water Heater 40 gal. Tall 4500-Watt Lifetime Electric Water Heater Marathon 50 Gal. Short 4500-Watt Lifetime Electric Water Heater Marathon 40 Gal. Tall 4500-Watt Lifetime Electric Water Heater
Brand Rheem Marathon Rheem Rheem
Ratings (834) (28) (202) (9)
Wattage (watts) 4500 4500 4500 4500
Part Warranty 6 Year 6 Year 6 Year 6 Year
Product Width (in.) 19 21.75 in 28.25 in 21.75
Product Height (in.) 61 61.5 47.25 61.5
Tank Capacity (gallons) 40 40 40
Water Heater Profile Tall Tall Short Tall
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Customer Reviews

40 gal. Tall 4500-Watt Lifetime Electric Water Heater is rated 4.7 out of 5 by 28.
Rated 5 out of 5 by from Excellent water heater, better than any I have owned We have had several water heaters in the past few years, living in the country the well water was hard on the other heaters. We tried a Marathon, upon advice from one of our new neighbors, and have not had one minute of trouble since then, just reliable hot water when we need it. We are going to replace our dairy barn water heaters with the larger Marathon units right after January 2012. Our local plumber also told us he has had almost zero problems with the Marathons and that the ones that had problems were due to being installed by someone who did not know what they were doing.
Date published: 2011-12-13
Rated 4 out of 5 by from First one leaked, Home Depot provided warranty replacement Marathon heater developed slow internal leak after two months. Home Deport arranged warranty replacement through Rheem. Employee (Amy) even delivered replacement in her personal vehicle and on her lunch hour. Hope this one meets expecations. Home Depot customer service could not have been better.
Date published: 2013-01-27
Rated 5 out of 5 by from So happy with this hot water heater The Marathon is so quick and efficient! I never wait for hot water or run out. It was easy to install and given the energy rating I'm hoping to save a lot just not having to rely on oil anymore.
Date published: 2013-04-23
Rated 5 out of 5 by from Very well designed Living in an upper condo, I wanted peace of mind from leaks as well as efficiency. This unit gives both. The delay between turning on the tap and having hot water is reduced to almost nothing so I waste much less water. Recharge time is fast. Very nice unit. Easy to install and no need to wrap because it's already insulated.
Date published: 2012-09-03
Rated 5 out of 5 by from This product is a great value and has a great warranty. This is our second Marathon Water Heater, the first one was so great that when our second conventional heater went out we did not even look around, we bought the another Marathon.
Date published: 2011-12-12
Rated 5 out of 5 by from great product...sleek looking water tank; nothing to erode and leak. It fits in a small closet with ease. lots of hot water too! My husband installed it and loves the idea of not having anything to erode and leak in the bedroom again.
Date published: 2012-04-19
Rated 5 out of 5 by from Excellent water heater! I live in a condominium and when it was time to replace my aging water heater, I wanted to get something that would last. The Marathon unit in a 40 gallon size was larger than the 50 gallon unit it replaced, and barely fit into the master closet where it had to be installed. Despite the overall size, the unit is quite light when empty, and easy to maneuver into place. It was installed in October of 2012, and has worked flawlessly since. The quality seems very high, and I definitely recommend this water heater. Now I don't have to worry about the tank leaking and damaging other units in my building.
Date published: 2014-06-17
Rated 5 out of 5 by from Marathon 40 Gal Hot Water Heater Bought this heater given it's all plastic design ie no anode rod ie no "smelly water". The unit is great appearance and quality. Installed with no issues and so far has worked fantastic. Not the cheapest heater around but again the only one with the all plastic design and has so far solved our smelly water problem!
Date published: 2011-12-17
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