40 Gallon Short Ultra Low NOx Natural Gas Water Heater - 6 Year Warranty

40 Gallon Short Ultra Low NOx Natural Gas Water Heater - 6 Year Warranty

Model: 40S6-40UNG


  • 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 non-CFC polyurethane foam insulation reduces heat loss for maximum efficiency, saves money
  • Ceramic tank lining and anode rod protects tank from corrosion, for long tank life
  • Factory installed temperature and pressure relief valve ensures safe operation
  • Ultra Low NOx natural gas model meets 10ng/J emissions standards

Product Dimensions
Height w/Draft Hood:51.50"
Weight:135 lbs.
Vent Type:Type B double wall
Vent Diameter:3"
Configuration and Overview
Capacity:40 Gallons
Family Size:3
Energy Star Certified:No
Energy Factor:0.62
LCD Display:No
Self Cleaning:Yes
Warranty Tank:6 Years
Warranty Parts:6 Years
Warranty Labor:3 Years
BTU Input:40,000 BTUs
Emissions Standards:Ultra-Low NOx
Ignition Type:Piezo
Water Connection Location:Top
Water Connection Size:0.75
T&P Relief Valve:Yes
Energy & Eco-Friendly
Energy Factor:0.63
NAECA III Complient:Yes
Meets Ultra Low NOx Requirements:Yes

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

Whirlpool Natural Gas and Liquid Propane Water Heater Owners Manual

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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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