Commercial Marathon 85 Gal. Lifetime 4500/4500-Watt Non-Metallic Electric Tank Water Heater
- Plastic tank wont rust; ideal in hard water applications
- Lightweight tank is easy to maneuver and position
- Same-day installation in most areas. Call 1-855-400-2552 by noon.
- See More Details
Frequently Bought Together
Price:
$132299
Product Overview
The 85 Gal. Tall Marathon non-metallic 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 the 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. Offers Lifetime tank and 6 year parts warranty for installation in Commercial buildings.
- California residents
- First hour rating of 91 GPH
- Offers lifetime tank and 6 year parts warranty for installation in commercial buildings
- Lower element is made of titanium steel for resistance to lime buildup
- 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
- Factory-installed temperature-and-pressure relief valve enhances your safety and offers peace of mind
- Thermally-fused upper element protects against dry firing
- Tough molded polyethylene outer shell resists dents, scratches and salt air
- Recessed brass drain valve is out of the way of brooms and scrubbers
- Designed for easy replacement of your existing water heater
- Water heater must be registered online within ninety (90) days of the installation date; lifetime warranties are only available to original occupied dwelling
- 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.
- Click here for more information on Electronic Recycling Programs
Product Overview
- Plastic tank wont rust; ideal in hard water applications
- Lightweight tank is easy to maneuver and position
- Same-day installation in most areas. Call 1-855-400-2552 by noon.
Compare Similar Electric Tank Water Heaters
 | |  |  | |
| Brand | Rheem | Rheem | Rheem | Rheem |
| Name | Marathon 75 Gal. Lifetime 4500/4500-Watt Non-Metallic Commercial Electric Water Heater | Commercial Marathon 85 Gal. Lifetime 4500/4500-Watt Non-Metallic Electric Tank Water Heater | Performance Platinum 80 Gal. 10-Year Hybrid High Efficiency Smart Tank Electric Water Heater | ProTerra 80 Gal. 10-Year Hybrid High Efficiency Smart Tank Electric Water Heater with Leak Detection & Auto Shutoff |
| Price | $108999 | $132299 | $199900 | $219999 |
| Ratings | (212) | (212) | (1313) | (1313) |
| Nominal Tank Capacity (gallons) | 75 | 85 | 80 | 80 |
| Application Type | Commercial | Commercial | Residential | Residential |
| Product Height (in.) | 58.625 in | 70.25 | 75 in | 75 in |
| Water Heater Profile | Tall | Tall | Tall | Tall |
| Product Width (in.) | 28.25 in | 28.25 in | 24.25 in | 24.25 in |
| Water Heater Features | Overheat Protection,Temperature Pressure Relief Valve | Overheat Protection,Temperature Pressure Relief Valve | Glass-Lined Tank,Overheat Protection,Temperature Pressure Relief Valve,Vacation Mode,WiFi | Glass-Lined Tank,Overheat Protection,Temperature Pressure Relief Valve,Vacation Mode,WiFi |
| Fuel Type | Electric | Electric | Electric | Electric |
| Efficiency Level | Super High | Super High | ||
| Smart Home | Smart Home Enabled | Smart Home Enabled | ||
| View Product | View Product | View Product | View Product |
Compare Similar Electric Tank Water Heaters
| | | | |
| Brand | Rheem | Rheem | Rheem | Rheem |
| Name | Marathon 75 Gal. Lifetime 4500/4500-Watt Non-Metallic Commercial Electric Water Heater | Commercial Marathon 85 Gal. Lifetime 4500/4500-Watt Non-Metallic Electric Tank Water Heater | Performance Platinum 80 Gal. 10-Year Hybrid High Efficiency Smart Tank Electric Water Heater | ProTerra 80 Gal. 10-Year Hybrid High Efficiency Smart Tank Electric Water Heater with Leak Detection & Auto Shutoff |
| Price | $108999 | $132299 | $199900 | $219999 |
| Ratings | (212) | (212) | (1313) | (1313) |
| Nominal Tank Capacity (gallons) | ||||
| Application Type | ||||
| Product Height (in.) | ||||
| Water Heater Profile | ||||
| Product Width (in.) | ||||
| Water Heater Features | ||||
| Fuel Type | ||||
| Efficiency Level | ||||
| Smart Home | ||||
| View Product | View Product | View Product | View Product |
Specifications
Dimensions
Kilo Watt
4.5
Product Depth (in.)
28.25
Product Height (in.)
70.25
Product Width (in.)
28.25 in
Tank Valve Size (in.)
0.75
Water Connection Size (in.)
3/4
Details
Amperage (amps)
18
Application Type
Commercial
Commercial/Residential
Commercial
Electricity Phase
Single Phase
Finish Family
Gray
First Hour of Delivery (gallons/hr)
91.0
Fuel Type
Electric
Household Size
5+
Indoor/Outdoor
Indoor
Maximum Temperature (F)
181
Minimum Temperature (F)
90
Nominal Tank Capacity (gallons)
85
Number of Elements
2
Pack Size
1
Product Weight (lb.)
139
Recovery Rate at 100F Rise (gallons/hour)
18.2
Required Volt Connection
240 volt
Returnable
180-Day
Tank Lining Material
Glass
Tank Warranty
10 Year
Uniform Energy Factor
0
Water Heater Features
Overheat Protection,Temperature Pressure Relief Valve
Water Heater Profile
Tall
Wattage (watts)
4500
Warranty / Certifications
Certifications and Listings
UL Listed
Labor Warranty
No Warranty
Part Warranty
1 Year
Questions & Answers
72Questions46Answers
Can you put this 85 gallon in your house, technically it's listed as commercial
Asked by Lee September 27, 20176
AnswersRheem, as well as other WH companies, often use this for their warranty. A commercial heater, installed on a residential setting will not necessarily have a warranty, as it isn't installed per manufacturer's instructions. Same thing goes, when you install a residential heater, in a business. Just keep that in mind, if you purchase this for the lifetime warranty. And especially the past year, Rheem has started following through with this. So, now you're warned.
Is a thermal expansion tank required with this water heater?
Asked by Quest113031 December 10, 20186
AnswersAn expansion tank is only needed when you are on public water and have a check valve at the water main. Otherwise if you are on a well, an expansion tank is not needed as an expansion tank allows for the expansion and contraction of the water as it heats up and cools down. on a well the pump tank will double as an expansion tank.
What BTU would this be equivalent to?
Asked by Jim May 15, 20185
AnswersEach 4500 watt element is equivalent to 15,354.639 BTU/Hr on this water heater.
Should this be run off a 20 amp or 30 amp breaker. I noticed the specs it listed 18 amps.
Asked by Builderbob August 24, 20175
Answers30 amp. I believe you should only use 80% so 30 amps X 80% is 24 amps. 20 wouldn't be enough.
Is this water heater compatible with a Jacuzzi walk in tub?
Asked by Lulu February 7, 20185
Answersyes, it would be compatible with a Jacuzzi, However, i'm not sure of the capacity of the tub in question. so i would verify that this unit would meet your needs as far as gallons needed to fill the tub.
titanium upper and lower elements?
Asked by sarayale February 8, 20164
AnswersFrom the Rheem website for the MHD models. "Titanium upper and lower elements for superior resistance to lime build-up" rheem.com/product/commercial-electric-water-heaters-marathon-heavy-duty
What is the energy rating for this water heater?
Asked by Steve January 3, 20184
AnswersIt does not have a lifetime warranty only 5 Years tank and 1 otherwise.
IS THE WATER HEATER ADJUSTABLE
Asked by brezzly September 15, 20154
AnswersYes. Two simple dials for each element (top and bottom).
can I use shark bite kits on this install
Asked by andy January 18, 20194
AnswersYes. I used shark bite on my install.
What is the diameter of this water heater?
Asked by Wayne August 5, 20183
Answers27.75"
Customer Reviews
Overall Ratings
Practically brand new and it's leaking
October 7, 2020
After installing the 50 gallon unit at one home and having no issues I got the 85 gallon water heater for my other home. Shortly after it was installed it started leaking. There is no water collecting around the top of the heater near the cold water inlet/hot water outlet and there is no water around the pressure relief valve or the drain valve BUT there is water collecting below the unit.
Used it to replace our original 80 gallon heater. Plumber installed, works great.
June 21, 2020
Used it to replace our original 80 gallon heater. Plumber installed, works great.
Old heater was on the outs so we looked at all kinds of replacement models. Decided on the Rheem ...
February 23, 2020
Old heater was on the outs so we looked at all kinds of replacement models. Decided on the Rheem Commercial series. The reviews were not bad on Home Depot but other sites were less than stellar. The bad reviews seem to coincide with earlier versions. We purchased online and picked it up at the store. Store helped with loading and we lugged it home. Word to the wise this thing is huge, so pay close attention to the dimensions if your replacement is smaller ours was 65 gallon. I installed it myself and this thing is working awesome. My girls are not complaining about running out of hot water anymore and the recovery time on this sucker is quick versus my 15 year old previous heater. Time will tell but so far we are happy with this heater. Do not forget to register your warranty you do get the lifetime if left unregistered.
I have all the hot water I need when I need it.
January 24, 2020
I have all the hot water I need when I need it.
Just installed, had hot water in a couple of hours. Looks like a well made unit, time will tell. ...
January 15, 2020
Just installed, had hot water in a couple of hours. Looks like a well made unit, time will tell. The vacuum valve was stuck open/leaked and had to be replaced.
I only have it in service for a few weeks and all I can say at that point is "so far so good". Co...
October 15, 2019
I only have it in service for a few weeks and all I can say at that point is "so far so good". Considering how fast it is delivering hot water to my shower it well exceed my expectations. And the installation was very easy.
REGISTER YOUR HEATER ASAP and read the fine print on the "warranty." This water heater was fanta...
August 16, 2019
REGISTER YOUR HEATER ASAP and read the fine print on the "warranty."
This water heater was fantastic for 4+ years. We are a family of 8 and never ran out of hot water. Then, on a Friday evening the faithful water heater water started to leak. Rheem's customer service hours are Monday - Friday, 9-5. So we went the weekend with no hot water. Made contact with Rheem Monday morning. After many phone calls back and forth between Rheem, then Home Depot, we were informed that we would get back what we paid for it, but that we had to pay out the extra $600+ for the current price. That was a low blow. So much for "Lifetime Warranty." THEN... we ordered our new hot water heater. The website said it would be delivered in 7-10 days. It took Home Depot 11 days to deliver it to store. We were with out hot water for 14 days.
Another blow was that we were told we would get a cash refund for our defective heater (so we could immediately apply it to the purchase of our replacement), but when we brought it back and went through return process they were not able to give us a cash refund. Instead they said "we will mail you a check in the next 21 days." Its been 11 days so far and no check. We are floating that $1200+ dollars. Home Depot gets 1 star for how helpful they were in this whole process. (Emily and Paula at customer service in our local store were very nice and helpful.)
Installed this product yesterday, and within hours of filling the water heater it started leaking...
March 3, 2019
Installed this product yesterday, and within hours of filling the water heater it started leaking from around the electric junction box. The warranty only covers the heater and shipping - so adding insult to injury I am responsible for disposal.
If you like a basically endless supply of hot water for your family and can’t go to tankless this...
February 19, 2019
If you like a basically endless supply of hot water for your family and can’t go to tankless this the best option out there. It’s a Super insulated bottle with 2 top of the line heating elements. The unit has a 98 efficiency rating. Rheem has winner with this product
Large unit compare to 40 gallon take. It fit through a door way. Works very well. Had to turn d...
January 23, 2019
Large unit compare to 40 gallon take. It fit through a door way. Works very well. Had to turn down the water temp due to being to hot. But it's an easy process.
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