50 Gallon Tall Natural Gas Water Heater - 9 Year Warranty

50 Gallon Tall Natural Gas Water Heater - 9 Year Warranty

Model: N50T91-403    Lowe's Item* #: 333571


  • 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:60.75"
Weight:148 lbs.
Vent Type:Type B Double Wall
Vent Diameter:3"
Configuration and Overview
Capacity:50 Gallons
Family Size:5+
Energy Star Certified:No
Energy Factor:0.58
Annual Cost of Operations:$282
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:0.58
50 Gallon Natural Gas Water Heater - N50T91-403 4.5 5 275 275
First time replacement This is the first time I have personally had to replace a water heater in my home. The install was uneventful, and the new unit gave us no trouble during the install. February 25, 2015
I like the new gas valve. you dont have to use a match to light the pilot Easy to install. Almost the same size as my old heater. February 24, 2015
Just recently installed the unit but initial performance is great I replaced an older model Whirlpool water heater with this unit and the performance is great. The heater controls appear to be more accurate to my desired temp settings and in the short time that I have had it installed, I have noticed that the gas burner seems to come on less frequent and stays on a shorter time. Therefore I assume my gas bill will be proportionally less. February 23, 2015
Easy Installation ENergy and gas efficient much better than previous water heater. good and sturdy well built product. February 22, 2015
Very good water heater. Excellent water heater. It is too new to tell how it will work long term but I trust it will be fine per our plumber's recommendation. February 22, 2015
Perfect This product is great. The water is always hot and I have never encountered running out of hot water, considering 8 people in the house and my kids love taking baths. February 22, 2015
This product works well as a direct replacment for a existing Whirlpool Heater This water heater was a direct replacement for an existing Whirlpool water heater of the same model. The previous heater failed after 9 yrs 6months due to pilot light / gas valve failure. This one was chosen due to the installation being the same as the existing model. Overall the install was very similar with only minor adjustments having to be made to the water supply lines and gas valve attachment due to a different gas valve being used on the newer model. Hopefully we will get more life out of this heater over the previous heater. February 22, 2015
Replacement, easy do it yourself project Old gas water heater started to leak, picked this one out for the reviews left by other customers. I was able to replace my old one myself in less then 2 hours. Easy do it yourself project as long as you have enough knowledge and are comfortable working with a natural gas line. February 14, 2015
Great price for a quality product This unit puts out all of the hot water I need plus it is able to recover very quickly when we have a lots of guests over. Had 22 people in the house last weekend and there was plenty of hot water for showers as needed. Previous units just took too long to recover. February 10, 2015

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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