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

Shop NowAll products available exclusively through Lowe's Icon
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 5 262 262
Whirlpool Gas Hot Water Heater This gas hot water heater is just right for our needs we have a two story house and it is very efficient for our daily use and convenience as well. December 2, 2014
Contact me back in a couple of years, then I'll have a valid opinion I have just installed this water heater, thus it is to soon to justify any of the above ratings. One reason I bought this one is because it replaced our old Whirlpool Water heater, which was 10 yrs old. I was hoping I would not have to change much of the plumbing between the two, and I didn't. I hope this new heater does not have any dumb features as our old one did, for the old heater originally used a "left handed" threaded thermal couple. Thus I had to keep coming back to Whirlpool to buy their specific thermal couple. Eventually Whirlpool did supply me with an adapter, so as that I may use a normal right handed thermal couple. If had known about this dumb feature when I bought the original water heater, I don't know if I would have bought it. December 1, 2014
I would buy it again-well we did get another whirlpool again My old Whirlpool lasted 9 years ( it was supposed to last only 6). This is a 9 year model so it should last a lot longer. If the pilot light hadn't stop going out who knows how long my old one would have lasted. It never started leaking or anything and I expect the same from this new one. It was easy to install all by myself. This one is taller than the old one so I had to shorted the vent stack. That took more time than anything. Anyway I am happy. Buzz I didn't think they would ask about my plumbing experience; I wouldn't say I am very handy just ordinary handy - if you can take it apart with ease you can put it back together, nothing to it. All you need is an adjustable wrench, pipe wrench, Teflon tape and a flat head screwdriver. Do turn off the gas and water supply when replacing and be patient when draining your old heater tank. December 1, 2014
easy to install and get working It appears to be a good purchase, since I have owned it for a few weeks. it replaced one that was 10+ years old. Easy to read instructions and easy to install. November 30, 2014
Great Features Easy ti install, Easy to ignite, like the blinking light to let me know the pilot light is on. November 27, 2014
Good price, value, and ease of installation Purchased the water heater and just installed it. Everything works great so far. I realize that it is early but all indications are that it is a very good water heater. I like the gas control that provides a status light. November 23, 2014
Product has good features for it's price. Bought because it had good features at an affordable price. November 18, 2014
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

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

You may need to install Adobe Reader  Adobe Acrobat Reader to view these documents.

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.

You may also like