Water Heater Maintenance: 7 Tips to Extend Its Life by 5+ Years

The average water heater replacement in Ontario costs $1,200 to $2,500 installed. The average lifespan is 10 to 12 years. With proper maintenance, you can extend that to 15 to 17 years, saving thousands. Here are seven habits that make the biggest difference.

1. Flush the Tank Annually

Ontario tap water contains minerals that settle as sediment at the bottom of your tank. A thick sediment layer forces the burner to work harder, raising gas consumption 10 to 20% and causing premature failure. Annual flushing removes this buildup.

2. Test the Pressure Relief Valve Every Year

The T&P valve is a critical safety device. If it has never been tested, it may be stuck closed, a serious explosion hazard. Lift the lever briefly until water flows out, then release. If the valve leaks afterward or won't close, replace it immediately.

3. Check the Anode Rod Every 3 to 5 Years

The sacrificial anode rod prevents your steel tank from rusting. It slowly dissolves over time. Once depleted, the tank corrodes rapidly. Replacing a depleted anode rod ($30 to $60) can add 5+ years to the tank's life.

4. Set Temperature to 49°C (120°F)

Higher temperatures accelerate mineral scale and stress fittings. 49°C prevents Legionella growth while minimizing scale. This also reduces your gas bill versus the common factory default of 60°C.

5. Insulate the First Two Feet of Pipes

Insulating the first 1 to 2 feet of hot and cold water pipes connected to your tank reduces standby heat loss and helps maintain temperature with less energy.

6. Keep the Area Clear and Well-Ventilated

Gas water heaters need proper combustion air. Items stored around the unit can restrict airflow and create CO risks. Keep at least 12 inches of clearance on all sides.

7. Book a Professional Inspection Every 2 Years

A licensed technician catches early signs of tank corrosion, gas valve issues, and flue problems invisible during DIY inspection. Catching these early prevents a $400 to $600 emergency call, or worse, a flooded basement.