40 Gallon Tall Natural Gas Water Heater - 12 Year Warranty

40 Gallon Tall Natural Gas Water Heater - 12 Year Warranty

Model: NU40T121-403    Lowe's Item* #: 333573


  • 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 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
  • Ultra Low NOx

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Product Dimensions
Height w/Draft Hood:62.25"
Weight:129 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:12 Years
Warranty Parts:12 Years
Warranty Labor:1 Year
BTU Input:40,000 BTUs
Emissions Standards:Ultra 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
Ultra Low NOx:Meets SCAQMD Rule 1121
40 Gallon Natural Gas Water Heater - NU40T121-403 4.5 5 64 64
This product is very reliable and on top of the line because it is made in USA The old whirlpool water heater I had lasted 14 years ( from 2000), longer than 12-year warranty. During 14 years I had no problem at all. I trust this product and love it very much that's why this time I bought this product again. Some of my neighbor are also using this product thanks to my recommendation. Next 12 years I will also buy this product again. You have a blessed day! February 20, 2015
Easy install Same height as my last hot water heater "58inch" to the top. so the old earth quakes strap fit perfect. nice flat grey /golden coler December 27, 2014
Im hoping this product lives up to its name nice design. Pilot is hard to see if its lit. Just installed and the water dosent stay hot. will have to see why? December 12, 2014
Easy Installation Purchased this unit for installation in a garage alcove. The builder did not allow room for a larger (wider) unit so had to go with this style/design. So far so good...will re-evaluate usage costs, performance in 6 months to 1 year! December 2, 2014
Excellent Product Easy installation, convenient features, nice looking, quiet operation. My only concern is temperature control knob is too easy to turn by mistake November 23, 2014
Easy to install and fire up. Very impressed with the smart technology on this water heater. Provides useful information and easy troubleshooting. November 15, 2014
This product was available at Lowe's close to my home. This product was the size I needed. I hope it works well for the 12 years it is warranted for. November 13, 2014
I'm old school, hope the tyechnology endures. I noticed after a few months the temperature started cooling without adjusting the setting. October 27, 2014
Lowes & Whirlpool brand name My purchase was at Lowes, Palm Desert, CA on October 11, 2014. The Lowes Department Mgr. and staff were more qualified and product educated versus when I made my visit to Home Depot. Most importantly, Lowes has a working relationship/contract with a company for installing the water heater. The Install Sales Dept. scheduled the appointment for me. I am familiar with the Whirlpool name but not the Water Heater. As a result I would not know how to evaluate the product features & rating. I would recommend the product because of the Lowes and Whirlpool brand name. Larry Prelesnik October 21, 2014
great value and features! this product was very easy to install and I like the new self lighting pilot. September 11, 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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