Marathon 50-Gal. Tall 4500 Watt Lifetime Electric Water Heater-MR50245 - The Home Depot


Model # MR50245

Internet # 100209103

Store SKU # 344915

50-Gal. Tall 4500 Watt Lifetime Electric Water Heater

Marathon 50-Gal. Tall 4500 Watt Lifetime Electric Water Heater

This item has been discontinued.
The Home Depot no longer carries this specific product.

$899.00 / each
  • 50-gal tank provides ample hot water supply for 2 - 3 bath home
  • Electric water heater is easy to maintain
  • Same-day installation in most areas. Call 1-855-650-2786 by noon


Model # MR50245

Internet # 100209103

Store SKU # 344915

Store SO SKU # 1000896508

The 50 Gallon Tall Marathon lifetime electric water heater 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.

  • Lifetime limited warranty on the tank, plus a 6-year limited warranty on the parts for your convenience
  • Meets or exceeds NAECA requirements
  • Bowl-shaped tank bottom drains completely for easy service and sediment removal
  • Requires a 240-volt electrical connection for installation
  • Plastic tank eliminates the need for an anode rod and prevents smelly water
  • Automatic thermostat keeps water at your desired temperature
  • Pipe wrap energy saving kit is included for energy savings
  • Exceeds National Appliance Energy Conservation Act (NAECA) and ASHRAE requirements

Info & Guides

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Assembled Depth (in.)  23.5 in  Assembled Height (in.)  63.75 in 
Assembled Width (in.)  23.5 in  Product Depth (in.)  23.5 
Product Height (in.)  62.75  Product Width (in.)  23.5 in 
Tank Valve Size (in.)  0.75  Water Connection Size (in.)  3/4 
Amperage (amps)  18.8  Application Type  Residential 
Estimated Yearly Operating Cost ($)  561.00  Finish Family  Gray 
First Hour of Delivery (gallons/hr)  61  Fuel Type  Electric 
Indoor/Outdoor  Indoor  Maximum Temperature (F)  150 
Minimum Temperature (F)  90 °F  Product Weight (lb.)  103 lb 
Returnable  90-Day  Tank Capacity (gallons)  50 
Water Connection Location  Top  Water Heater Features  Overheat Protection,Temperature Pressure Relief Valve 
Water Heater Profile  Tall  Wattage (watts)  4500 
Warranty / Certifications
Certifications and Listings  1-UL Listed  ENERGY STAR Certified  No 
Labor Warranty  No Warranty  Part Warranty  6 Year 


Rated 4.6 out of 5 by 87 reviewers.
Rated 5.0 out of 5.0 by It is all we expected it to be To start with, the delivery went great. The installation was fairly easy as well. The unit is larger than our old one, but we knew that and had the room for it. If you are considering this heater,make sure you have the room as it is larger than some others. Once hooked up, it produced hot water much faster than expected based on the literature provided. We seem to have hotter water delivered faster to all parts of our house now. Don't know if the old unit was just that inefficient, but the new one is getting the credit for the performance. The unit is costly, but we were willing to accept that for the peace of mind of the lifetime warranty on the tank. As a homeowner insurance adjuster, I see ruptured water heaters every week and the damage can be devastating. This unit is also recommended by our local electrical cooperative for its efficiency...and it looks really cool for a water heater! July 23, 2013
Rated 1.0 out of 5.0 by no product support I purchased this water heater with great expectations given the high failure rate of all my previous metal water heaters. So I was greatly dismayed when after less than 2 weeks this heater began leaking from the hot water discharge coupling. I literally tried for hours to reach Marathon customer support but to no avail. If it wasn't for Home Depot's refund policy I would be stuck with a lemon. So although the manufacturer talks big regarding longevity, buyer beware should you ever need warranty repair or replacement past the 90 day window provided by Home Depot. March 12, 2015
Rated 5.0 out of 5.0 by Good Quality, Easy Install for experienced DIYer Higher price than a standard unit, however the poly tank and no anode provides us with a more reliable unit. The metal unit we replaced this with was probably within a few months of failure due to rusting bottom. The higher price should be offset by not having to replace this unit as soon as a regular metal system. One note - the measurements on the Home Depot specs do not include the preinstalled connections on the top of the unit, the shipping box however does show this measurement which is a few inches higher than on the site, (about 3"). Had measured the place to install prior to ordering and when it arrived had to rethink how to install. We used PEX and copper fittings/connections. Had my brother who has plumbing experience do the soldering. You can see from the photo how we looped the connections since the tank was taller than expected. April 14, 2013
Rated 5.0 out of 5.0 by Solid Investment We purchased a home earlier this year that offered our first experience with well water. The cold water was fine but, about two weeks after moving in, the hot water began to smell. Plumber said it was due to sulfur reacting with the anode in the one year old water heater. We tried changing the anode rod with a new one from the manufacturer. All that did was extend the amount of time between having to drain and flush the tank from two weeks to three. Options we were given were to simply cut the anode rod off. That would have caused the tank to go bad in a short period of time and, void what was left of the five year warranty. The other was to buy and add a drip chlorine system to the well pump which we did not want to do. I did a lot of research, on the causes and cures for smelly well water, and finally came across the Rheem Marathon on the Home Depot site. With no anode or metal lining it was supposed to end smelly water caused by well water reacting with the water heater. It has delivered on that promise. It’s was light weight so when it was delivered I was easily able to move it inside from where the delivery service left it. The plumbers had it installed in less than 40 minutes. There doesn’t appear to be any heat loss through the tank skin like you feel with a traditional water heater. Oh, and did I mention, no more smelly water! Even without a water issue, after having it for a few months, I’d still buy it. We’ve put a lot of money into this home already but the Rheem Marathon, without a doubt, is one of the best investments we have made. October 26, 2013
Rated 4.0 out of 5.0 by Great product with lifetime on tank Very large. Installed in attic which was difficult. Not only tall but too wide to fit through attic door. I was able to install by removing a couple of blocks on the attic door. That was my bad because the measurements were accurate from rheem. Only problem is I had to change upper thermostat within 10 months. Warrantee doesn't cover return shipment which cost almost as much as new thermostat. A little disappointed about that although I had to change thermostat in my old heater yearly anyway. I do plan on changing my other water heater with a smaller 40 gallon rheem water heater. Very happy with energy savings! December 3, 2013
Rated 5.0 out of 5.0 by Great Water Heater We've had a rotten egg odor in our water. Researching on line we found the odor was caused by the anode rod in our gas water heater. We liked the design of the Rheem Marathon electric water heater. It has a lifetime guaranteed plastic tank, with no need for a anode rod. After installing the new water heater we now have no odor. Installation was not a big job, and went smoothly. We also like the fact that the tank is well insulated, and very energy efficient. Don Titus November 18, 2014
Rated 5.0 out of 5.0 by vast improvment over standard water heater The Marathon is dollar for dollar worth the extra expense. Non-metal tank and no anode translates less sediment over the years (therefore cleaner water). Lightweight but well insulated, adding both tank wrap and pipe wrap will simply save more. The curved features should add some churning action to the tank, lowering the need to flush the tank as often. Better water, lower operating costs, less maintenance. The higher price is a long term investment. March 12, 2013
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Basic Home Shipping includes delivery to your doorstep or first dry area outside with no signature or appointment required. Delivery services for this item may be upgraded for an additional fee.

Other Delivery Options:

Threshold Home Shipping (By Appointment) includes delivery across your first doorway or threshold (i.e. into garage, backyard, or first room of the home). The carrier will contact you to make a delivery appointment with a 4 hour window once the items have arrived at the local hub in your area. Delivery appointments are required.

White Glove Home Shipping (By Appointment) includes delivery to the room of your choice, unpacking and debris removal. Assembly is not included. The carrier will contact you to make a delivery appointment with a 4 hour window once the items have arrived at the local hub in your area. Delivery appointments are required.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.