Your water heater is one of the hardest-working appliances in your home, running day and night to provide hot water for showers, dishes, laundry, and more. But like all appliances, it has a limited lifespan.
Traditional tank water heaters typically last 8-12 years. The lifespan depends on several factors: water quality (hard water shortens life), maintenance frequency, installation quality, and usage patterns. In the Treasure Valley, our hard water can shorten tank life by 1-2 years if the unit isn't flushed regularly.
Tankless water heaters last significantly longer, typically 15-20 years. Because they don't store hot water, they're less susceptible to corrosion damage. However, they still need periodic maintenance including descaling to remove mineral buildup.
Watch for these signs that your water heater is failing: rust-colored hot water, rumbling or popping noises, leaks around the base of the tank, inconsistent water temperature, water that takes longer to heat, your unit is over 10 years old, and frequent repairs needed.
When deciding whether to repair or replace, consider the age of the unit and the cost of repair compared to replacement. As a general rule, if your water heater is over 10 years old and the repair costs more than half the price of a new unit, replacement is the smarter investment.