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Internet # 205931673

Model # MR40245

Store SKU # 1005850033

Store SO SKU #1001295845

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

$1150.02
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  • Plastic tank will not rust; ideal in hard water applications
  • Make sure it fits: measure your space to ensure dimensions fit
  • WA and OR Residents – see disclaimer below before purchasing
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Product Details

About This Product

Get hot water when you need it with this Marathon 40 gal. Electric Tank Water Heater. It's crafted from plastic so there is no odor to your water and it won't rust over time. It's ideal for homes of two to four people.

Highlights

  • Washington and Oregon Residents: THIS WATER HEATER DOES NOT MEET DEMAND RESPONSE REQUIREMENTS. REGULATIONS PROHIBIT THE SALE, SHIPMENT OR INSTALLATION OF THIS WATER HEATER IN A STATE THAT REQUIRES DEMAND RESPONSE WATER HEATERS.
  • If your home is in a state that requires Demand Response water heaters, please select an approved Demand Response model available on homedepot.com.
  • Lifetime limited warranty on the tank, plus a six-year limited warranty on the parts for your convenience (registration required)
  • Marathon's lightweight tank is easier to maneuver and position
  • Bowl-shaped tank bottom drains completely for easy service and sediment removal
  • Perfect for replacement: the tank's size and light weight makes it easy to get home and in position
  • Non-metallic tank and jacket resist corrosion
  • Titanium lower element for superior resistance to lime build-up
  • Multiple layers of filament wound fiberglass give the tank unmatched strength
  • Peace-of-mind: backed by a lifetime limited warranty on the tank and a 6-year limited warranty on parts (with registration)
  • Full-flow, brass drain valve
  • Thermally-fused upper element protects against dry firing
  • High temperature polysulfide dip tube
  • Call 1-855-400-2552 before noon for same-day installation service in most areas, or visit our Water Heater Installation page for more information.
  • Meets 2015 NAECA standards
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 205931673

Model # MR40245

Store SKU # 1005850033

Store SO SKU #1001295845

Specifications

Dimensions: H 61.5 in, W 21.75 in, D 21.75 in

Dimensions

Kilowatt

4.5

Product Depth (in.)

21.75 in

Product Height (in.)

61.5 in

Product Width (in.)

21.75 in

Tank Valve Size (in.)

0.75 in

Water Connection Size (in.)

3/4 in

Details

Amperage (A)

18.75 A

Application Type

Residential

Efficiency Level

High

Electricity Phase

Single Phase

Finish Family

Gray

First Hour of Delivery (gallons/hr)

51

Fuel Type

Electric

Household Size

2-4

Indoor/Outdoor

Indoor

Maximum Temperature (F)

150 F

Minimum Temperature (F)

90 F

Nominal Tank Capacity (gallons)

40 gal

Number of Elements

2

Pack Size

1

Product Weight (lb.)

91 lb

Rated Tank Capacity (gallons)

38 gal

Required Volt Connection

240 volt

Returnable

90-Day

Tank Lining Material

Glass

Tank Warranty

Lifetime

Uniform Energy Factor

0.92

Water Connection Location

Top

Water Heater Features

Overheat Protection, Temperature Pressure Relief Valve

Water Heater Profile

Tall

Wattage (watts)

4500 W

Warranty / Certifications

Certifications and Listings

UL Listed

Labor Warranty

No Warranty

Part Warranty

6 Year

Questions & Answers

142Questions
caret
Q:What size are the hot and cold hex nuts?
by|Jun 11, 2024
1 Answer
Answer This Question

A:  Hi John and thank you for your question. The fittings are 3/4" NPT.

by|Jun 12, 2024
    caret
    Q:What size breakers or fuses do you need for it to run
    by|Apr 29, 2024
    1 Answer
    Answer This Question

    A:  Hi and thank you for your question. The Recommended Over Current Protection Copper (fuse or circuit breaker amperage rating) is 25. The Wire Size AWG Based on N.E.C. Table 310-16 (75°C) is 10.

    by|Apr 29, 2024
      caret
      Q:These Marathon water heaters require a vaccume relief valve. How can a system that is constantly under pressure need this ? I can't fathom any reason there would be a vaccume placed on a water heater. Especially in a closed well system.
      by|Apr 28, 2024
      2 Answers
      Answer This Question

      A:  Vacuum relief valves are used to help drain the water heater, that’s all!!!!! Ronnie the Master Plumber and Master gas fitter for more than 40 years!

      by|Jun 6, 2024
        1 found this answer helpful

        A:  Hi RonL and thank you for your question. Vacuum relief valves are used in water heater/tank applications to automatically allow air to enter into the piping system to prevent vacuum conditions that could siphon the water from the system and damage water heater/tank equipment.

        by|Apr 29, 2024
          caret
          Q:Will this water heat fit inside a 24 in pan? I know the specs say it’s 23.5 in wide, just wondering if it could fit inside the 24 inch pan.
          by|Apr 8, 2024
          1 Answer
          Answer This Question

          A:  Hi Robert and thank you for your question. No.

          by|Apr 9, 2024
            Showing 1-4 of 142

            Customer Reviews

            4.5 out of 5

            • 4.5 out of 484 reviews
            • 87% recommend this product
            Filter by:
            Showing 1-10 of 484 reviews
            Works like a charm, easy to adjust temp, looks like no other water heater in a GOOD way. Engenders confidence, since no corrosion with polymer material.
            by
            Response from RheemApr 4, 2024
            Steve,

            We are glad to hear that your Marathon 50 gal. 4500 -Watt Tall Electric Water Heater is working well for you. The polymer material indeed helps prevent corrosion, extending the lifespan of the unit. It’s great that you find it easy to adjust the temperature and appreciate its unique design. Thank you for this 5-star review.

            Derius rheem
            • Verified Purchase
            Drain valve won't shut after annual service.
            Purchased from HD 1 year ago. I felt it was expensive. Went in without issue, and heated water fast. Never runs low on hot water. More good news, my power bill went down. Issues: 1. The thermostat runs hotter than expected. Research confirmed this is a known issue. 2. After annual flush, discharge outlet leaks. Product support for possible warranty issue? Nada. Purchased 6/17/22; Delivered/installed 6/29/22. Parts warranty expired 4/6/23. What the???
            by
            Response from RheemJun 27, 2023
            Hi,

            Thank you for this 5-star review. If you need assistance with your water heater, please contact our Technical Support team at 866-279-4566 between the hours of 7 A.M. and 7 P.M. CST. One of our experienced analysts will be happy to assist you.

            Derius rheem
              • Recommended
              4 found this review helpful
              LOOKS LIKE A MISSILE!
              After installing several different types of water heaters that either don’t work and/or don’t last, I decided to install this one with its non-metallic, corrosion-proof tank along with a stainless steel water expansion tank (with a REAL mounting bracket mind you), and brass fittings with stainless steel connections. Now I actually have confidence that I won’t be dealing with rust problems a few years down the road. Totally worth the investment. Also, it LOOKS LIKE A MISSILE!!!
              by
              Response from RheemOct 13, 2022
              Hi,

              Thank you for choosing Rheem Water Heating for your home, we are thrilled to hear you are enjoying your new water heater and appreciate you taking time to write this review. If you ever have any questions about your new heater, please call Rheem Technical Support at 866-279-4566 between the hours of 7 A.M. and 7 P.M. CST and one of our experienced analysts will be happy to assist you. Thank you for choosing Rheem for your water heating needs!

              Derius rheem
                • Recommended
                4 found this review helpful
                From a 33-year-old tank to a lifetime tank
                I noticed some rust on the outside bottom of my 33-year-old hot water tank but no water on the floor. I flushed and changed the sacrificial rod every two years and water came out very slowly these past two times. Not wanting any surprises, I took preemptive action and decided to replace the tank. Research showed that the tank was made by Rheem and installed 33 years ago. Being very curious, I cut the tank in half to see if rupture was imminent. I found no noticeable rust inside the tank anywhere except around the rod connection at the top where a very small amount of water must have leaked out and worked its way down the insulation to the bottom skin. There was also about 6 inches of 'crud' in the bottom of the tank made up mostly of chunks of sacrificial rod pieces which hindered proper tank draining. There appeared to be no potential for tank rupture, but the 'crud' hindered proper operation of the lower heating element, so I'm glad I replaced it with 'I hope' to be another long-lasting Rheem hot water heater. Self-installation was very simple with flexible hoses and a minor adjustment to increase the water high temperature. So far, so good.
                by
                Response from RheemOct 21, 2022
                Hi,

                Thank you for the 5-star review! We are glad to hear you are enjoying your new Rheem Water Heater! If you need assistance with your water heater, please call our Technical Support team at 866-279-4566 between the hours of 7 A.M. and 7 P.M. CST.

                Derius rheem
                • Verified Purchase
                • Recommended
                6 found this review helpful
                Not worth it
                I like the concept (which is why i gave it 2 stars). Unfortunately this unit is poorly constructed. Because there is a glass lining, you have to be very careful not to break it because the plastic makes it that much more fragile. The inlet, outlet, and relief valve flop around until torqued to a fitting. If you put too much stress on any of those, you will break the glass lining. Takes up too much space (same size as a small refrigerator). It is top heavy and can tip very easily if you live in an area where you don't stap it to the wall. Mine leaked pretty bad under the inlet just below the plastic case. I'm sure that the good reviews are truthful but i think that they lucked out. These are so sensitive to damage that a lot of these units get sent back. Says in the manual if you need help, Rheem is available 7 days a week. I called at 10am on a Saturday and got a closed recording which did not state their operating hours. I returned it to the store.
                by
                Response from RheemMar 29, 2021
                Hi Steve,

                We are sorry to hear the Marathon Water Heater did not meet your expectations and that you had trouble when calling Technical Support. If we can help answer any question in the future please call 866-279-4566 between the hours of 7 A.M. and 7 P.M. CST and one of our experienced analysts will be happy to help you.

                Jennifer rheem
                  • Recommended
                  14 found this review helpful
                  Satisfied Customer
                  This is the water heater model I had to have. From Magnesium to Aluminum to zinc Marathon. No one has a more potent water than what I have been dealing with. I was careful to take measurements because I knew it was going to be tight. I forgot to allow room for the thermostat covers. The plumber rotated it, so it was not a problem. I wanted this to look nice because it took a long time for me to save for this. I took out the top shelf. I glued some boards over the holes. Maybe I can buy some buy some poster board in the arts and crafts Section. I stayed with copper pipes and fittings-vertical installation. I wanted tees and pipes coming over and down. Everything is rigid and stationary so there is no lateral stress on the stub pipes. I thought it might keep the seals from leaking. I had the plumber install a ball valve. The expansion tank was an upgrade. The inspector will be coming out soon. Rheem states that it is necessary to have a drain no more than six inches in circumference under the relief valve discharge tube. I have a drain that is larger; and it could whisk away a lot of water. It is covered up right now though. The cat’s litter box is next to it. He prefers the drain. Overall, I think the plumber did a really nice job. I will have someone build new cabinets in the future.
                  by
                    • Recommended
                    6 found this review helpful
                    Gushing water 5 days before parts warranty expires (almost 6 years)
                    I bought and installed this new in June 2014. It is May 2020 and the water heater is gushing water from the top. These are sealed and insulated so I can't tell what is wrong. Emergency plumber is $150 an hour so I'll wait till monday to call during normal hours. Also, Rheem is closed on saturday so I can't start the claim. Was trouble free for almost 6 years. Hope it doesn't take forever to get the new one/replacement parts so the family can take a warm shower.
                    by
                      • Recommended
                      6 found this review helpful
                      Gushing water 5 days before parts warranty expires (almost 6 years)
                      I bought and installed this new in June 2014. It is May 2020 and the water heater is gushing water from the top. These are sealed and insulated so I can't tell what is wrong. Emergency plumber is $150 an hour so I'll wait till monday to call during normal hours. Also, Rheem is closed on saturday so I can't start the claim. Was trouble free for almost 6 years. Hope it doesn't take forever to get the new one/replacement parts so the family can take a warm shower.
                      by
                        • Recommended
                        18 found this review helpful
                        Gushing water 5 days before parts warranty expires (almost 6 years)
                        I bought and installed this new in June 2014. It is May 2020 and the water heater is gushing water from the top. These are sealed and insulated so I can't tell what is wrong. Emergency plumber is $150 an hour so I'll wait till monday to call during normal hours. Also, Rheem is closed on saturday so I can't start the claim. Was trouble free for almost 6 years. Hope it doesn't take forever to get the new one/replacement parts so the family can take a warm shower.
                        by
                          • Recommended
                          6 found this review helpful
                          Professionally installed , leaky valve from day one
                          Just had the 50 gallon Marathon installed. I love the idea of no anode rod, eliminating the sulfur smell and nonmetallic tank. As soon as it was installed it leaked from the top valve. I knew immediately from reading reviews it was a known issue from at least back in 2016 that Rheem indicated they would look into. I’m now stuck without a hot water heater til I can decide which to replace it with. Seems it’s the only one without the anode rod but I don’t want to take the chance replacing it from the same company. From my experience and reading reviews I wouldn’t purchase another one.
                          by
                          Response from RheemApr 9, 2020
                          Hi,

                          We can certainly help you with your concern, please call Technical Support at 866-279-4566 between the hours of 7 A.M. and 7 P.M. CST and one of our experienced analysts will be happy to assist you.


                          Jennifer rheem
                            12 found this review helpful
                            Showing 1-10 of 484 reviews

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