40 Gallon Tall Natural Gas Water Heater - 9 Year Warranty

40 Gallon Tall Natural Gas Water Heater - 9 Year Warranty

Model: N40T91-403    Lowe's Item* #: 333570


  • FLAME LOCK® Safety System Reduces the Risk of Accidental Fires Involving Flammable Vapors
  • Electronic Gas Valve has fewer moving parts than a conventional mechanical gas valve, for durability and long life-no external power source is needed
  • Self-Diagnostic Electronic Gas Control incorporates an LED status indicator that monitors and reports on system operational status
  • Piezo Electric Igniter makes lighting the pilot fast and easy
  • Environmentally friendly polyurethane foam insulation reduces heat loss for maximum efficiency, saves money
  • Ceramic tank lining and aluminum anode rod protects tank from corrosion, for long tank life
  • Factory installed temperature and pressure relief valve ensures safe operation

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Product Dimensions
Height w/Draft Hood:62.00"
Weight:127 lbs.
Vent Type:Type B Double Wall
Vent Diameter:3"
Configuration and Overview
Capacity:40 Gallons
Family Size:4
Energy Star Certified:No
Energy Factor:0.59
Annual Cost of Operations:$277
LCD Display:No
Self Cleaning:Yes
Warranty Tank:9 Years
Warranty Parts:9 Years
Warranty Labor:1 Year
BTU Input:40,000 BTUs
Emissions Standards:Low NOx
Ignition Type:Pilot with Piezo Igniter
Foam Insulation:1 inch
Water Connection Location:Top
Water Connection Size:3/4 inch
T&P Relief Valve:Yes
Energy & Eco-Friendly
Energy Factor:0.59
40 Gallon Natural Gas Water Heater - N40T91-403 4.5 5 255 255
2nd one, 1st one only lasted 30 months before flooding garage This was a warranty replacement for one that only lasted about 30 months. So I can't give this product a higher rating, until I see if it lasts longer then the one it replaced. The installer told me that they have had a few defective water heaters from whirlpool, so I probably won't buy another whirlpool water heater. The only reason I bought this whirlpool was because the defective one was under warranty, otherwise I would have bought a different brand. November 10, 2014
n/a good by, I like it. Whirlpool made a good and reliable unit. November 8, 2014
11/9 Heater just replaced my 9 year natural gas water heater, that lasted 11 years, with an upgraded model. November 7, 2014
This water heater has outstanding pilot and lighting features. The installer told me of the excellent features;such as the new lighting features,new type of pop off valve, and how easy it is to maintain with the air filter wrap ,and easy servicing of the air filter for easy cleaning and re installation for a trouble free heater. November 6, 2014
This was an easy set up. My last water heater was a Whirlpool, so I went with the same model. I am pleased with the service and technical support I have received. November 4, 2014
reliable we had the previous water heater also a whirlpool for seven years and one month did't make the nine year warranty, Everyone was great dealing with the warranty process. November 4, 2014
Like everything except the LED light My 5 year old water heater started leaking, i contacted Whirlpool and they said they would replace it under warranty. Awesome! i just took the old one to Lowe's and picked-up the new one. Didn't cost a thing. October 23, 2014
So far so good! This water heater is replacing a 16 year old A O Smith and I had it installed professionally because it is in the attic...! I was limited to the water heaters due to the opening size going to the attic but this water heater is 18" in diameter and fit fine thru the opening. October 20, 2014
Great Water Heater This is a great water heater. It installs fast, and lights up easily. October 19, 2014
Love it - Easy to operate Took about 2 1/2 hrs to remove old unit and install new water heater. Everything fit back just fine. Fast recovery time for hot water. Only took about 1 1/2 hrs to have hot water after unit was turn on. Looks good next to my new Whirlpool Furnace and A/C. Very quiet heater. At first I had to check a couple times to see if it was still operating since it is so quiet. October 13, 2014

Owners Manual
Comprehensive information about your new appliance - from getting started to cleaning and maintenance - with answers to frequently asked questions.

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Troubleshooting & Repair

IMPORTANT - Read and follow the printed Installation Instructions that came with your water heater. The printed Instructions and product labels contain model-specific information, important warnings and safety notices. If you lack the necessary skills to install, troubleshoot or repair the water heater, get help from a qualified person.

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