A.O. Smith Signature 100 74-Gallon Short 75100-BTU Natural Gas Water Heater - Item #816119 | Model #G6-S7576NV

• Delivers the ideal amount of hot water for households with 5+ people when sized appropriately

• Features an environmentally friendly 75,100 BTU gas burner that delivers 125 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 the system's operational status

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

• Low-profile 61-in high x 26.5-in diameter design with TOP water connections allows for easy installation under counters or vanities and inside cabinet

• Provides superior tank protection and extends water heater life with premium heating elements, anode rod and fused ceramic tank shield

• High-altitude certified from 0 ft to 7,700 ft
  

What our Experts Think

• Plenty of hot water for larger homes: With a nominal 74‑gallon tank and 75,100 BTU Low NOx burner, this natural gas heater delivers up to ~125 gallons in the first hour, making it well‑suited for households of 5+ people with simultaneous showers and appliance use.

• Efficient, precise control: The electronic gas valve with self‑diagnostic LED readout provides accurate temperature regulation and system feedback, helping optimize performance and troubleshooting.

• Compact short design: The short profile (~61″ high × 26.5″ diameter) lets you install this high‑capacity heater in utility closets or tighter spaces where a taller tank won’t fit.

• Built for durability: Tank Guard® protection, premium anode rod, and fused ceramic shield help resist corrosion and extend service life compared to standard tanks.

• Safety‑first features: Includes a built‑in safety system to reduce accidental flammable vapor ignition and factory‑installed temperature & pressure relief valve for code‑compliant use.

• High‑altitude capable: Certified for installation from 0 ft up to ~7,700 ft elevation, giving flexibility in varied geographic locations.

Q&A

Q: What household size is this water heater suitable for?
A: Ideal for households of 4–6 people, providing ample hot water for showers, laundry, and multiple simultaneous uses.

Q: What type of fuel does it use?
A: Operates on natural gas, delivering fast recovery and efficient heating.

Q: How powerful is the heater?
A: Features a 75,100-BTU burner, designed for high-demand households needing large amounts of hot water.

Q: What are the dimensions of this short design?
A: Short, compact design suitable for tighter spaces, despite its large 74-gallon capacity.

Q: Does it include safety features?
A: Yes. Comes with a temperature and pressure relief valve and standard protections for safe operation.

Q: Is it energy efficient?
A: Yes. Engineered for high thermal efficiency, reducing gas consumption while providing continuous hot water.

Q: How is the tank protected from corrosion?
A: Equipped with a protective anode rod and premium tank materials for long-lasting durability.

Q: What are the installation requirements?
A: Requires natural gas connection, proper venting, and indoor residential installation.

Maintenance Tips

• Flush the tank annually: Drain and flush every 6–12 months to remove sediment that reduces heating efficiency and protects the tank.

• Inspect the anode rod: Check the sacrificial anode rod yearly and replace if heavily corroded to prevent internal rust.

• Check gas and venting connections: Ensure gas lines, fittings, and vent pipes are secure, unobstructed, and corrosion-free.

• Test the T&P relief valve: Operate the temperature & pressure relief valve yearly to ensure proper safety function.

• Monitor burner operation: Watch for irregular ignition or flame color changes, which may indicate venting or gas issues.

• Inspect for leaks: Regularly check water connections, fittings, and tank base for moisture or corrosion.

• Maintain a clean, ventilated space: Keep the surrounding area dry, clear, and well-ventilated for safe operation and easier maintenance.