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Internet # 204697833

Model # XP40S12HE36U0

Store SO SKU #1001020878

Performance Platinum 40 Gal. Short 12 Year 36,000 BTU Liquid Propane Tank Water Heater

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  • Platinum design provides long-lasting tank protection
  • 40-Gallon tank provides hot water for households with 2-4 people
  • Restricted in CA and UT – see disclaimer below
  • View More Details
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Return this item within 90 days of purchase. Read Return Policy

Product Details

About This Product

The Rheem Performance Platinum 40 Gal. Liquid Propane Short Water Heater comes with a 36,000 BTU/hour burner that provides ample hot water for households with 2 to 4 people. The push button ignition system ensures safe and easy startup. Its maintenance free combustion air intake system means there are no filters to clean and replace. The self-diagnostic gas valve monitors system performance. A premium grade anode rod provides long lasting tank protection. Factory installed temperature and pressure relief valve and 3/4 in. water connections are included with the water heater for easy installation.


  • 40 Gal. tank provides ample hot water for households with 2 to 4 people
  • Delivers 69 Gal. of hot water in the first hour
  • 12-year limited warranty on tank and parts for your convenience
  • 3-year in home labor warranty for peace of mind
  • Self-cleaning feature reduces sediment and mineral build-up to prolong tank life
  • 0.58 uniform energy factor makes this one of the most efficient gas water heaters available
  • Maintenance free - no filter to clean or replace
  • Push button ignition system simplifies the startup process
  • Self-diagnostic gas valve monitors system performance
  • Rated for installations up to 10,200 ft.
  • Designed for easy replacement of your existing water heater
  • 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
  • Click here for more information on Electronic Recycling Programs
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 204697833

Model # XP40S12HE36U0

Store SO SKU #1001020878


Dimensions: H 50.25 in, W 21.5 in, D 21.5 in


Product Depth (in.)

21.5 in

Product Height (in.)

50.25 in

Product Width (in.)

21.5 in

Tank Valve Size (in.)

0.75 in

Vent diameter (in.)

3 in

Water Connection Size (in.)

3/4 in


Application Type


BTU Rating


Efficiency Level


Finish Family


First Hour of Delivery (gallons/hr)


Fuel Type


Gas Connection Size

1/2 in

Gas Type


Household Size




Maximum Temperature (F)

160 F

Minimum Temperature (F)

45 F

Nominal Tank Capacity (gallons)

40 gal

Pack Size


Product Weight (lb.)

125 lb

Rated Tank Capacity (gallons)

40 gal



Tank Lining Material


Tank Warranty

12 Year

Uniform Energy Factor


Vent Type


Water Connection Location


Water Heater Features

Overheat Protection, Temperature Pressure Relief Valve

Water Heater Profile


Warranty / Certifications

Certifications and Listings

CSA Certified, FVIR Certified

Labor Warranty

3 Year

Part Warranty

12 Year

Questions & Answers

Q:actual dimensions?
by|May 11, 2024
1 Answer
Answer This Question

A:  Hi Kenny, this unit is 50.25 inches tall and 21.5 inches wide.

by|May 12, 2024
    by|May 4, 2024
    1 Answer
    Answer This Question

    A:  Georgemulleneaux, Please check with local codes.

    by|May 6, 2024
      Q:Does it have a pilot ?
      by|Mar 24, 2024
      1 Answer
      Answer This Question

      A:  Fred, Thank you for your question. Yes this water heater has a Pilot Assembly.

      by|Mar 25, 2024
        Q:Do I need an expansion tank with this water heater ?
        by|Mar 13, 2024
        1 Answer
        Answer This Question

        A:  Troy, It is recommended to have one. Please also check with your local codes.

        by|Mar 13, 2024
          Showing 1-4 of 33

          Customer Reviews

          4.7 out of 5

          • 4.7 out of 873 reviews
          • 97% recommend this product
          Filter by:
          Showing 1-10 of 873 reviews
          Sturdy Packaging,Easy Instructions for Quick Install and Start Up. Looks Well Made. Hot Water Fast and Quiet Heating
          Response from RheemMay 22, 2024
          Hello David,

          We appreciate your 5-star review! It is great to know that you are pleased with your new Rheem Water Heater!

          Isaiah rheem
          • Verified Purchase
          Pretty straightforward install to replace old unit. I used the short model to increase ventilation rise to ( hopefully) fix back draft issue. Good results after one month in service, but only time will tell if there are problems.
          Response from RheemMay 22, 2024

          We are glad to hear that you had a good experience with the installation of the Performance 40 Gal. Short 36,000 BTU Liquid Propane Water Heater from The Home Depot. It’s great that the short model helped to increase the ventilation rise and potentially fix the back draft issue.

          It’s always a good idea to monitor the performance of new appliances over time to ensure they’re working as expected. Enjoy your new water heater!

          Derius rheem
          • Verified Purchase
          I wasted my time buying from Home Depot i
          I special ordered a Rheem water heater. I picked it up at Home Depot, Mishawaka, IN. I hired a company to install, by found it had been crushed on bottom. The ordered another and when it arrived another week later, It also was crushed on the bottom. I decided not to waste any more time with Home Depot.
          Response from RheemApr 2, 2024

          We are really sorry to hear about your experience with the water heater you have purchased from The Home Depot. It’s indeed frustrating when a product arrives damaged, not once but twice. Your feedback is valuable in reference to these potential issues. If you haven’t already, please contact 866-279-4566 between the hours of 7 A.M. and 7 P.M. CST.

          Derius rheem
            The 12 year tank warranty is excellent
            After our Rheem 50 gallon heater gave us 27 years of service, we decided to replace it with this slightly smaller 40 gallon version with their longest 12 year tank warranty. Installation was very simple. We also bought some longer flexible 3/4" hoses to account for the shorter tank height. It is much quieter than the 1996 model it replaced. At the 'hot' setting the water is plenty hot enough and we can take back to back showers with no issues. Hoping it will save some money on propane gas too!
            Response from RheemMar 14, 2023

            Thank you for this 5-star review! We are glad that installation was simple and easy for you. 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
              • Recommended
              1 found this review helpful
              Surprisingly easy to install
              It took two weeks to get the special order delivered to home Depot. It was extremely easy to install. It had the dielectric nipples already installed and the safety valve and a brass drain valve. All that was just connecting the old plumbing to the water heater and the propane line. It started right up and heats water a lot faster than my 16-year-old Kenmore performance water heater. It also keeps the water heated longer compared to the old Kenmore. The only tricky part was the exhaust tube.
                • Recommended
                1 found this review helpful
                Guess I really never realized my old hot water heater wasn’t working as well as it could but, whe...
                Guess I really never realized my old hot water heater wasn’t working as well as it could but, when I installed this Raheem Platinum series, “WOW”! This new Rheem really does an excellent job. I took a shower about 30 minutes after installing it and nearly burned myself with all the hot water. I have readjusted it to better fit my needs but, I am very impressed
                • Verified Purchase
                • Recommended
                2 found this review helpful
                Works excellent I can have the setting to low and still have a long hot shower and it does not ru...
                Works excellent I can have the setting to low and still have a long hot shower and it does not run that often so I am using less propane then I was before. I have had it approx 1 month and I highly recomend this unit.
                • Verified Purchase
                • Recommended
                4 found this review helpful
                Could not get Pilot Light to stay on
                Purchased this unit online and picked up and proceeded to install the water heater without any issues. After I had everything hooked up and filled with water I followed the lighting procedure and could not get the pilot light to stay lit after numerous attempts. I called the Rheem Service Phone Number and explained the situation. The customer service representative told me I needed to replace the Pilot Light Assembly. He ordered me a Pilot Light Assembly Kit but said it will take 2-3 days to arrive. I checked to see if the Home Depot carried the part and no luck, it would have to be ordered. Here I am on a Friday afternoon and no hot water until the part arrives next Monday or Tuesday.....Very Dissapointed Indeed. I researched many different brands of water heaters before I chose the Rheem and it appears to have been the wrong decision. Hopefully the Pilot Light Assembly Kit will correct the situation and I can update this review with something positive. Now I get to explain to my wife why we will not have any hot water for the next few days. If the new part does not correct the problem, I will be looking into returning the Water Heater and purchasing a different brand.
                Response from RheemFeb 23, 2018
                Hi Kevin,

                Thank you for purchasing the Rheem Performance Platinum 40-Gallon Power Liquid Propane Water Heater. We apologize for the inconvenience and hope you are now enjoying your heater. If you have any questions or concerns 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,
                Jennifer rheem
                  7 found this review helpful
                  Easy install, It heats water what can I say, I hope it lasts the 9 years. I wish it was not so ex...
                  Easy install, It heats water what can I say, I hope it lasts the 9 years. I wish it was not so expensive.
                  • Verified Purchase
                  • Recommended
                  Platinum Plus Rheem water heater
                  Easy to install . Review based on price, features, warranty, directions and install. Only been installed a few days so we will see about the quality.
                  • Verified Purchase
                  • Recommended
                  Showing 1-10 of 873 reviews

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