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Internet # 204318410

Model # XP40T12DM36U0

Store SO SKU #1001020815

Performance Platinum 38 Gal. Tall 12 Year 36,000 BTU Liquid Propane Tank Water Heater

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  • Power Damper keeps more heat inside the tank, raising efficiency
  • 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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Product Details

About This Product

The Rheem Performance Platinum 38 Gal. Liquid Propane Tall Water Heater comes with a 36,000 BTU/hour burner that provides ample hot water for households with 2 to 4 people. The electronic ignition system eliminates the standing pilot light, saves energy and monitors system Performance. Its maintenance free combustion air intake system means there are no filters to clean and replace. 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.


  • Powered flu damper delivers higher efficiency by closing when burner is not operating, trapping more heat in the unit
  • Requires standard 110-Volt electrical outlet (3-prong grounded) for installation
  • Delivers 66 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
  • 0.68 uniform energy factor indicates a high efficiency gas water heater
  • Maintenance free - no filter to clean or replace
  • Electronic ignition system simplifies the startup process and eliminates the need for a pilot light
  • Electronic diagnostic gas valve monitors system performance
  • Rated for installations up to 10,100 ft.
  • Designed for easy replacement of your existing water heater
  • Click here to learn more about Eco Options and Energy Efficiency
  • 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
  • 2019-06-26
  • Click here for more information on Electronic Recycling Programs
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 204318410

Model # XP40T12DM36U0

Store SO SKU #1001020815


Dimensions: H 58 in, W 19.75 in, D 19.75 in


Product Depth (in.)

19.75 in

Product Height (in.)

58 in

Product Width (in.)

19.75 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)

38 gal

Pack Size


Product Weight (lb.)

140 lb

Rated Tank Capacity (gallons)

38 gal



Tank Lining Material


Tank Warranty

12 Year

Uniform Energy Factor


Vent Type


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:Does this unit require a power vent to outside
by|Oct 26, 2023
1 Answer
Answer This Question

A:  Hi User and thank you for your question. No it does not require a power vent, but does require venting as described in the user manual. Powered flu damper delivers higher efficiency by closing when burner is not operating, trapping more heat in the unit

by|Nov 12, 2023
    2 found this answer helpful
    Q:does this have a igniter, where you dont have to light the pilot light?
    by|Jul 4, 2023
    1 Answer
    Answer This Question

    A:  Hi john and thank you for your question. The electronic ignition system eliminates the standing pilot light, saves energy and monitors system Performance.

    by|Dec 2, 2023
      2 found this answer helpful
      Q:Can this water heater be vented through 3" PVC pipe as the super-efficient ones do? Also, I have two 90-deg bends in existing vent pipe before exiting vertically through the roof - no way to vent directly through the roof with existing configuration.
      by|Apr 20, 2023
      1 Answer
      Answer This Question

      A:  Hi Robert and thank you for your question. No it can not.

      by|Sep 20, 2023
        Q:Will this qualify for inflation reduction act 30% tax deduction
        by|Apr 15, 2023
        1 Answer
        Answer This Question

        A:  Hello John, you will need to check for rebates through your state and local government or electric utility provider.

        by|Feb 10, 2024
          Showing 1-4 of 52

          Customer Reviews

          4.5 out of 5

          • 4.5 out of 552 reviews
          • 91% recommend this product
          Filter by:
          Showing 1-10 of 552 reviews
          Product is garbage, warranty is garbage.
          Do not by a Rheem hot water tank. The gas control valve failed after 1 year. The replacement provided worked only intermittently so they also sent me the igniter assembly. That caused the tank to stop working entirely. A $150 service call to a licensed plumber later.....and they say that the gas control valve has failed again. Rheem refuses to issue a refund... the warranty will only replace parts, provide some service calls or replace the garbage you already bought with more garbage.
          Response from RheemNov 14, 2022

          Thank you for this review. We apologize for the inconvenience you have experienced and hope the issue has been resolved. If you still need assistance, 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.

          Derius rheem
            Exceed my expectation
            I bought it on Saturday, May 27 and get installed the same day. This unit replaced my 5 years old Bradford-White which had already changed gas control unit and had only 6 years warranty. The
            • Verified Purchase
            • Recommended
            Honest Review
            We purchased this hot water just about a month ago and todate we are very pleased with this product. We hired a local plumbing company, not only to pick it up for us, but install at a very reasonable price.This hot water heater seems to be well designed and well put together. There is definitely a difference between this Energy Star model and our previous hot water heater. The Rheem is a little larger in diameter and slightly taller. I really like the automatic damper on the flue pipe, this really helps with keeping the heat in the tank. At no time can you ever feel any heat transfer from the hot water to the outside of the metal tank. The water heats very quickly and you seldom see or hear the heater reheating the water. I also like the electric gas valve on the Rheem, it automatically started the burner as soon as it was plugged in, when it was first put to use, rather trying to light the pilot and thermocouple. I would definitely recommend this unit to others. Lastly, our energy company offers a rebate when you purchase an Energy Star unit.
            • Verified Purchase
            • Recommended
            Excellence in Design and Quality
            This is the best water heater I ever purchased and installed! The engineering is state of the art and surpasses any water heater on the market by far! No pilot light to waste energy, the thermostat can actually be set to a specific temperature instead of the old fashioned, Warm, Hot, Very Hot settings. The flue damper is 24volt so it closes when the burner cuts off to keep the heat in the flue stack! The 12 year warranty is also a big plus that comes with this model.
            • Verified Purchase
            • Recommended
            great heat supply for a family of 2-4
            it has been working good for close to a year with no complaints
              • Recommended
              Only had it a week, it works great
              Bought this a week ago and so far it works great! Would definitely recommend this water heater. Great value for the money
              • Verified Purchase
              • Recommended
              We replaced a larger heater with this one. It has a quick recovery time. Havent run out of hot ...
              We replaced a larger heater with this one. It has a quick recovery time. Havent run out of hot water yet. 4 people in the house. The Wi Fi connection is nice, makes it easy to turn it down during non use periods
              • DIY
              • Verified Purchase
              • Recommended
              3 found this review helpful
              Works great love the wifi option and leak detector
              Works well, pretty quiet. Wifi option is nice to have with the leak detector.
              • Verified Purchase
              • Recommended
              Excellent value, good efficiency
              I purchased this model to replace a 36+ yr old electric hot water heater after we installed natural gas. I considered more efficient condensing models, but reading reviews, it didn't seem like they would have the long term reliability commensurate with their price. Installed it myself, and I'm very happy with its performance. I wish that Rheem's wifi module for this heater had a better reviews, because I would like to be able to monitor and control it remotely.
              • Verified Purchase
              • Recommended
              Two weeks and going strong
              Self installed to replace 16 year old HW heater of same brand. Self ignitor worked perfectly. Quiet operation. I have yet to connect WiFi module but looking foward to testing. My only criticism is that draft hood was not secured well for transporting HW heater home. Also draft hood screws no included but not a big deal.
              • Verified Purchase
              • Recommended
              Showing 1-10 of 552 reviews

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