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 4.4 5 274 274
Excellant product at a reasonable price Installed my last Whirlpool 12 years ago - this unit was not leaking yet but pilot had had to be lite often and sediment was building it was time to be proactive January 27, 2015
first time DIY Install - no problems I've only had the water heater up and running for four months, but everything seems to be working well. We have a 1.5 bath 3 bedroom home with a basement and two above ground levels, and we have yet to hit the "out of hot water" point. January 22, 2015
This product has great features. You don't have to get down on the floor to light the flame. The flashing light indicate when it's on. It's very efficient. I I love it. January 17, 2015
simple features nice and simple, had replaced and 6 year water heater, which lasted just a little over 6 years, w\ a 9 year hope for the best..... January 13, 2015
From what I have read appears has good features. Just installed but installed easily although just watched professional install. So far is delivering hot water as needed. Overall just like other hot water heaters. So far so good January 12, 2015
Ask me in two years This water heater is a replacement of the same. It is too soon for me to do an actual review on this particular model because the exact model I had to replace was only 2 years and3 months old when it sprung a leak and flooded my garage. The extended warranty covered entire cost of replacement which is a good thing! I am going to assume the 1st water heater was a "lemon" and will put my trust in this one. If in 2 years I have an issue with this one, I will be writing another review and it will not be kind. January 8, 2015
easy install and nice features I found the unit easy to install and the gas supply valve self diagnostic feature is a real nice feature. Being able to light the unit without fiddling with matches and accesing the combustion chamber is also a plus. January 2, 2015
This product is easy to handle Although some sophisticated it is easy to install and to operate; the auto pilot is a plus; it should be added some sort of indicator re: height of water in inner tank vs height of sediment. Also your recommendation about cleaning (removing) the sediment from the inner tank based on the quality of water available from the Public Utility Department, it may be different from (geo) area to area. It seems to me one of the critical components is the burner, heavier and more durable materials should be used for fabrication. These two items may play against your rated guaranty life. December 30, 2014
Ease of operation was a plus. The water heater installed today went seamless. The cost of the unit was comparable with other models of the same type and size. December 29, 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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