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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

$1,068.55 /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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Customer Reviews

Rated 4.7 out of 5 by 28 reviewers.
Rated 5.0 out of 5.0 by I would not use any other type of water heater!!! I purchased this water heater because it is the only water heater on the market that does not put aluminum into the water. All other water heaters have a warning not to drink the water from a hot water heater because they contain an aluminum anode that adds poisonous aluminum salts into the water and are not safe to drink. Check out the other hot water sites, they say right in their web sites "do not drink the water from their hot water heaters" it is for washing and bathing only. This water heater produces safe clean hot water. October 9, 2012
Rated 5.0 out of 5.0 by This product is everything I expected so far. The delivery was excellent, on time and without any issues. Installing the heater was extremelly simple. I used Sharbyte connectors and the whole installation was done in less than 30 minutes. I am still surprised how easy this was to do. So far the water temperature is great. December 11, 2013
Rated 5.0 out of 5.0 by 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. June 17, 2014
Rated 5.0 out of 5.0 by 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. December 13, 2011
Rated 5.0 out of 5.0 by Great water heater My old heater started leaking ... after some shopping around I selected this 40 Gal plastic tank heater. It was easy to install and I did it my self with no issues. I now have hot water that has no metal taste because this tank does not require a "rust rod" due to the plastic tank. Still 4500 watts of power like the others and little more expensive than a regular heater .. looks great and works great. January 23, 2015
Rated 5.0 out of 5.0 by Runs great so far....give it 10 years and I'll write another review I ordered online & got it shipped to my home. But it didn't show up for 2 weeks so I called home depot, & they gave me the number of a local shipping company. I had to call the local shipping company & set up a time for them to deliver it to my house. The product itself is great, runs great...But I don't think I can give an adequate review, until I see how it's running 5-10 years from now. I guess we'll see. February 28, 2012
Rated 5.0 out of 5.0 by 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. September 2, 2012
Rated 5.0 out of 5.0 by Great Heater. Very Slow Delivery Great water heater. You get what you pay for. I have one for the main house, and just ordered another for the rental house. However, don't believe Home Depot's info on how long it will take to ship. Definitely order one of these before you need it, as it took 2 wks for it to arrive, and I had to scramble in the interim. April 9, 2013
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