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 5 212 212
seems to be well built. it was an easy install and fired right up, had no problems! April 18, 2014
Contractors comments I bought the water heater from Lowes and was feeling all warm and fuzzy about purchasing a Whirlpool product. I brought the heater home and left it standing in the bed of my truck so the contractor could unload it. The first comment he/they had when they got out of their vehicle is, "You are not going to like this heater." I ask why and was told that if a part breaks or needs replacing, it has to ordered direct from Whirlpool. Then he went on to say that his company would not do Warranty work on this heater or repairs, they just installed them. I was in a bind so I told them to install the heater and I would take up any warranty issues direct with Whirlpool. I really hope I don't regret having this product installed! April 15, 2014
like the features on this waterheater Like this water heater fine. Did have trouble with one just like it that was installed Jan 22, 2014, but that can and does happen with any product. Had a Whirlpool water heater for about 19 years with no problems at all. Will buy Whirlpool appliances as long as they are available. April 13, 2014
It was just installed It was just installed a few days ago, so it is too soon to give much of a review. It looks good, that's about all I can say at this point. March 31, 2014
Easy to Install This water was easy to install and very easy to start up March 31, 2014
Install My son installed my new hot water tank and said the circumference of the tank is much smaller than my old one making install easier and also easy to light from my old tank. March 31, 2014
easy to install I was able to install this water heater with the help of a friend without any problems. It started right up and got the water hot very quickly. I am very happy with the product. March 27, 2014
great size and very relaible Always had good luck with this brand. my old water heater lasted 9 years in an area with extremely hard water. love the fact this new one has an exchangeable anode rod that will help with mineralization reduction. thanks for the upgrade! March 24, 2014
This product has great features Today it was installed. To early to make any comments,. Thank you March 22, 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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