A.O. Smith Signature 100 50-Gallon 6-year Limited 40000-BTU Natural Gas Water Heater - G6N-T5040NVR

• Ideal hot water delivery for households with 5+ people when sized appropriately

• Environmentally friendly 40,000 BTU Low NOx gas burner delivers 81 gallons in the first hour

• Electronic gas valve provides precise temperature control for optimum hot water delivery

• Self-diagnostic electronic gas control incorporates an LED status indicator that monitors and reports on system operational status

• Built-in safety system reduces the risk of accidental flammable vapor ignitions

• Tall and slim 60.75-in H x 21-in diameter profile is designed for easier installation

• Protective anode rod and fused ceramic tank shield provide superior tank protection and extend water heater life

• High-altitude certified from 0 ft to 10,100 ft
  

What our Experts Think

• Reliable Mid‑Size Hot Water Supply
  The 50‑gallon capacity of the A.O. Smith Signature 100 G6N‑T5040NVR provides ample hot water for larger households or high‑demand usage—generally suitable for families of 5 + people when sized properly.

• Strong Heating Performance
  A 40,000 BTU Low NOx natural gas burner delivers robust heat and an estimated first‑hour output of ~81–84 gallons, helping meet peak usage like simultaneous showers and laundry.

• Smart Electronic Control & Diagnostics
  Electronic gas valve with LED status indicator and self‑diagnostic control help maintain proper temperature and simplify troubleshooting without guesswork.

• Built‑In Safety Features
  Integrated safety systems reduce risks of accidental flammable vapor ignition, and a temperature & pressure relief valve provides essential operational safeguards.

• Durable Tank Protection
  Tank Guard® protection with anode rod and ceramic shield extends tank life by reducing corrosion and sediment buildup—especially valuable in regions with hard water.

• Slim, Installation‑Friendly Design
  The tall, narrow profile fits in tighter spaces, and high‑altitude certification (up to ~10,100 ft) ensures performance in varied installations.

Q&A

Q: What is the A.O. Smith G6N‑T5040NVR?
A: The A.O. Smith Signature 100 G6N‑T5040NVR is a 50‑gallon tall natural gas storage water heater designed for residential use, delivering reliable hot water for homes with around five or more occupants. It’s part of the Signature 100 series and includes a 6‑year limited warranty on tank and parts.

Q: How much hot water does it produce?
A: Featuring a 40,000 BTU Low NOx natural gas burner, this water heater produces up to 84 gallons of hot water in the first hour under typical conditions — ideal for showers, laundry, and dishwashing.

Q: What type of ignition and control system does it use?
A: It uses an electronic gas valve with LED status indicator and a push‑button ignition for easy startup and precise temperature control.

Q: What safety and durability features does this model include?
A: This unit includes a built‑in safety system to reduce accidental vapor ignition risk, a factory‑installed temperature & pressure relief valve, protective anode rod, and a ceramic fused tank shield to help resist corrosion and extend service life.

Q: What are its dimensions and installation requirements?
A: The heater has a tall, slim profile (~60.75″ height × ~22″ diameter) and is designed for indoor installation with atmospheric venting and 3/4″ water connections. It’s also certified for use at high altitudes up to ~10,100 ft.

Maintenance Tips

• Flush & drain regularly: Drain and flush the tank after the first 6 months of use, then at least once a year (more often with hard water) to remove sediment and prevent noise and efficiency loss. Inspect and replace the anode rod when necessary to extend tank life.

• Inspect the anode rod: Check the sacrificial anode rod annually. Replace if heavily corroded to protect the tank from internal rust.

• Check the T&P valve: Annually lift and test the temperature & pressure relief valve to ensure it moves freely and isn’t clogged; replace or service if it sticks.

• Keep venting clear: Inspect vent pipes and combustion air openings for obstructions, debris, or corrosion to ensure safe gas combustion and reliable operation.

• Clean air intake & burners: Check and clean any air filter or burner area to prevent combustion issues; dust and lint can cause pilot outages and poor ignition.

• Monitor electronic gas control: Use the built‑in LED status indicator to monitor operational codes; consult the manual or a technician if error codes appear.

• Check for leaks and corrosion: Periodically inspect all connections, fittings, and the tank exterior for signs of water or gas leaks, rust, or wear.

• Professional servicing: Have a qualified technician inspect gas controls, venting, and safety devices annually to maintain efficiency and safety.