Model # MR40245

Internet #205931673

Store SO SKU #1001295845

Rheem Marathon 40 Gal. Tall 4500/4500-Watt Elements Non Metallic Lifetime Electric Tank Water Heater
0020352664453

Rheem

Marathon 40 Gal. Tall 4500/4500-Watt Elements Non Metallic Lifetime Electric Tank Water Heater

  • Plastic tank wont rust; ideal in hard water applications
  • Make sure it fits: measure your space to ensure dimensions fit
  • Call for an Installation Quote at 1-855-400-2552
$ 1079 99
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Frequently Bought Together

Frequently Bought Together

Product Overview

  • Plastic tank wont rust; ideal in hard water applications
  • Make sure it fits: measure your space to ensure dimensions fit
  • Call for an Installation Quote at 1-855-400-2552
The 40 Gal. Tall Marathon lifetime electric water heaters provide 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 (registration required)
  • Meets or exceeds NAECA requirements
  • Bowl-shaped tank bottom drains completely for easy service and sediment removal
  • Plastic tank eliminates the need for an anode rod and prevents smelly water
  • Non-metallic tank and jacket resists corrosion
  • Thermally-fused upper element protects against dry firing
  • Bowl shaped tank bottom allows complete sediment draining
  • Full-flow, brass drain valve
  • Titanium lower element for superior resistance to lime build-up
  • Low lead compliant
  • 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
  • Click here for more information on Electronic Recycling Programs
  • California residents see Prop 65 WARNINGS

Product Overview

  • Plastic tank wont rust; ideal in hard water applications
  • Make sure it fits: measure your space to ensure dimensions fit
  • Call for an Installation Quote at 1-855-400-2552
Model #: MR40245
Internet #: 205931673

The 40 Gal. Tall Marathon lifetime electric water heaters provide 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 (registration required)
  • Meets or exceeds NAECA requirements
  • Bowl-shaped tank bottom drains completely for easy service and sediment removal
  • Plastic tank eliminates the need for an anode rod and prevents smelly water
  • Non-metallic tank and jacket resists corrosion
  • Thermally-fused upper element protects against dry firing
  • Bowl shaped tank bottom allows complete sediment draining
  • Full-flow, brass drain valve
  • Titanium lower element for superior resistance to lime build-up
  • Low lead compliant
  • 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
  • Click here for more information on Electronic Recycling Programs
  • California residents see Prop 65 WARNINGS

Info & Guides

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Name Performance Platinum 40 Gal. Medium 12 Year 5500/5500-Watt Elements Mobile Alert Compatible Electric Tank Water Heater Marathon 40 Gal. Tall 4500/4500-Watt Elements Non Metallic Lifetime Electric Tank Water Heater Marathon 50 Gal. Tall 4500/4500-Watt Elements Non Metallic Lifetime Electric Tank Water Heater Marathon 50 Gal. Short 4500/4500-Watt Elements Non Metallic Lifetime Electric Tank Water Heater
Brand Rheem Rheem Rheem Rheem
Ratings (693) (24) (57) (229)
Wattage (watts) 5500 4500 4500 4500
Product Width (in.) 20.25 21.75 23.5 28.25 in
Water Heater Features Overheat Protection,Self Cleaning,Temperature Pressure Relief Valve Overheat Protection,Temperature Pressure Relief Valve Overheat Protection,Temperature Pressure Relief Valve Overheat Protection,Temperature Pressure Relief Valve
Water Heater Profile Medium Tall Tall Short
View Product View Product View Product View Product

Specifications

Dimensions

Product Depth (in.)
21.75
Product Height (in.)
61.5
Product Width (in.)
21.75
Tank Valve Size (in.)
0.75
Water Connection Size (in.)
3/4

Details

Amperage (amps)
18.75 A
Application Type
Residential
Finish Family
Gray
First Hour of Delivery (gallons/hr)
51
Fuel Type
Electric
Indoor/Outdoor
Indoor
Maximum Temperature (F)
150
Minimum Temperature (F)
90
Nominal Tank Capacity (gallons)
40
Product Weight (lb.)
91lb
Rated Tank Capacity (gallons)
38
Required Volt Connection
240 volt
Returnable
90-Day
Tank Lining Material
Glass
Tank Warranty
Lifetime
Uniform Energy Factor
0.92
Water Heater Features
Overheat Protection,Temperature Pressure Relief Valve
Water Heater Profile
Tall
Wattage (watts)
4500
Wattage (watts)
4500

Warranty / Certifications

Certifications and Listings
1-UL Listed
Labor Warranty
No Warranty
Part Warranty
6 Year

Specifications

Dimensions

Product Depth (in.)
21.75
Product Height (in.)
61.5
Product Width (in.)
21.75
Tank Valve Size (in.)
0.75
Water Connection Size (in.)
3/4

Details

Amperage (amps)
18.75 A
Application Type
Residential
Finish Family
Gray
First Hour of Delivery (gallons/hr)
51
Fuel Type
Electric
Indoor/Outdoor
Indoor
Maximum Temperature (F)
150
Minimum Temperature (F)
90
Nominal Tank Capacity (gallons)
40
Product Weight (lb.)
91lb
Rated Tank Capacity (gallons)
38
Required Volt Connection
240 volt
Returnable
90-Day
Tank Lining Material
Glass
Tank Warranty
Lifetime
Uniform Energy Factor
0.92
Water Heater Features
Overheat Protection,Temperature Pressure Relief Valve
Water Heater Profile
Tall
Wattage (watts)
4500
Wattage (watts)
4500

Warranty / Certifications

Certifications and Listings
1-UL Listed
Labor Warranty
No Warranty
Part Warranty
6 Year

Questions & Answers

does this unit use an anode rod?

Asked by: John
So what are the heater elements made of and how do the heat the water if not in the water as they always have. Heater elements have been made of metal.
Answered by: Teman99
Date published: 2018-11-28

Can this be installed in the attic or is the temp to high

Allen
Asked by: Allynn
I don't see any reason why not.
Answered by: JimS
Date published: 2018-09-05

Why does HD not sell the 30 gal version of the Rheem Marathon as it has the same quality features...

Why does HD not sell the 30 gal version of the Rheem Marathon as it has the same quality features I would think, but is 9 inches shorter, 16 lbs lighter, with a slightly higher efficiency and lower price? We use very little hot water in a small house, and it would be a perfect fit.
Asked by: hybrid
thank you, I will ... it really is 12.5" shorter I found out
Answered by: hybrid
Date published: 2018-06-14

Can you get a gas tank.

Asked by: 246lt
Unfortunately these units only come electric and not gas.
Answered by: Rheem
Date published: 2018-05-06
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Customer Reviews

Marathon 40 Gal. Tall 4500/4500-Watt Elements Non Metallic Lifetime Electric Tank Water Heater is rated 4.0 out of 5 by 24.
Rated 5 out of 5 by from So far so good. Haven't had it very long time... So far so good. Haven't had it very long time but the water is good and hot and seems to be operating fine.
Date published: 2019-01-11
Rated 5 out of 5 by from We are very happy with our new water heater. ... We are very happy with our new water heater. The rotten egg smelly water is now gone. For two years, we thought we had to purchase new filter system for our well water. It turns out that our well water has sulfide gas and it reacts with the anode rod in the water heater causing the bad smell (we even had a plumber replaced a brand new anode rod but still had the same bad smelly water). With the Rheem Marathon, there is no anode rod to react with the sulfide gas. We are enjoying our showers every morning now. Your store should have more advertisements for this water heater. People with well water should know about this. Thank you Rheem for designing this great water heater.
Date published: 2018-09-12
Rated 3 out of 5 by from Yes but not through home depot it took nearly 3 weeks and showed up looking like it fell off the ... Yes but not through home depot it took nearly 3 weeks and showed up looking like it fell off the back of a truck ,home depot catskill made promises and did keep and didnt care.
Date published: 2018-09-11
Rated 2 out of 5 by from The unit arrived in a battered box. Once installed... The unit arrived in a battered box. Once installed it leaked at the drain valve. Rheem service desk had long holds and was of no use... very disappointing. So my contractor drained the tank again, added some plumbers tape.. and now, it seems, we are good to go. But it cost me.
Date published: 2018-08-28
Rated 5 out of 5 by from It's only been a few weeks since we installed the... It's only been a few weeks since we installed the Marathon 40 gallon tank.So far we are very happy with this plastic hot water tank. We are on a well with VERY hard water and we have a softener. no smell from a anode rod---Yea. I just wish they had them sooner as we have had to replace our propane
Date published: 2018-08-07
Rated 5 out of 5 by from Very easy to install. Work great. ... Very easy to install. Work great.
Date published: 2018-06-26
Rated 5 out of 5 by from Easy to install. This was a replacement in a closet,... Easy to install. This was a replacement in a closet, and because it is a little larger diameter than the old one, I had to enlarge the closet door frame. After that the install was straightforward. Lifetime warranty and easy installation covers the additional cost of the water heater.
Date published: 2018-06-26
Rated 5 out of 5 by from Installation want smoothly, hot water within 30 min. after turning... Installation want smoothly, hot water within 30 min. after turning on.
Date published: 2018-05-22
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