A.O. Smith Signature 100 50-Gallons Short 4500-Watt Double Element Electric Water Heater - Item #816161 | Model #E6-50R45DV

• Delivers the ideal amount of hot water for households with 3 to 4 people when sized appropriately

• Features two 4,500-watt copper heating elements that provide a first hour delivery of 57 gallons

• Operates at a 0.92 Uniform Energy Factor for maximum energy-efficiency and cost savings

• Short 49.25-in H x 23-in diameter design, ideal for condensed spaces like under staircases or closet installations

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

• Reduces heat loss with non-CFC polyurethane foam insulation and factory-installed heat trap nipples for maximum efficiency and energy savings

• Features easy temperature control with adjustable thermostat you can set higher or lower for dishwashers and laundry machines

• Factory-installed temperature and pressure relief valve and tamper-proof drain valve ensures safe operation

Specifications

What our Experts Think

• Ample hot water for families: Designed for homes with 3–4 people, the 50‑gallon tank delivers a first‑hour hot water output of about 57 gallons, supporting daily showers, laundry, and dishwashing needs.

• Reliable heating performance: Dual 4500‑watt copper heating elements and a 0.92 Uniform Energy Factor (UEF) help heat water efficiently while lowering energy costs vs. older electric models.

• Space‑saving short design: With a compact 49.25″ height and 23″ diameter, this short tank fits in tight indoor spaces like utility closets or under stairwells.

• Durable construction: Premium heating elements, a protective anode rod, and a ceramic‑fused tank shield resist corrosion and extend tank life.

• Energy‑saving insulation: Non‑CFC polyurethane foam insulation and heat‑trap nipples reduce standby heat loss, improving overall efficiency.

• Easy control & safe operation: Adjustable thermostat lets you tailor output for appliances and showers, while factory‑installed temperature and pressure relief and tamper‑proof drain valve enhance safety.

Q&A

Q: What household size is this water heater suitable for?
A: Ideal for households of 3–4 people, providing ample hot water for showers, laundry, and daily use.

Q: How powerful are the heating elements?
A: Features two 4,500‑watt copper heating elements for efficient heating and a first-hour delivery of approximately 66 gallons of hot water.

Q: Is it energy efficient?
A: Yes. Operates at a Uniform Energy Factor (UEF) of 0.92, reducing standby heat loss and lowering energy costs.

Q: What are the dimensions of the short design?
A: Measures about 49.75 inches high and 22.25 inches in diameter, suitable for tight spaces like closets or basements.

Q: What safety features are included?
A: Includes a temperature and pressure relief valve, adjustable thermostat, and tamper-resistant drain valve for safe operation.

Q: How is the tank protected from corrosion?
A: Equipped with a fused ceramic tank shield, protective anode rod, and premium heating elements to extend tank life.

Q: What are the installation requirements?
A: Requires 240-volt power, top water connections, and is designed for indoor residential installation.

Maintenance Tips

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

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

• Check heating elements and thermostat: Inspect upper and lower 4500‑W elements and thermostats to ensure consistent hot water and safe operation.

• Test T&P relief valve: Lift and release the temperature & pressure valve annually to verify proper function.

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

• Maintain safe operating area: Keep the surrounding space clean, dry, and unobstructed for proper airflow and maintenance access.

• Fill tank before powering on: Ensure the tank is full before restoring power to avoid dry-firing and element damage.