How Long Does a Water Heater Last? (And Signs Yours is Dying)

A standard tank water heater lasts 8-12 years. Tankless units last 15-20+. Knowing where you are in that range — and watching for warning signs — helps you replace on your terms instead of in an emergency.

Average lifespans by type

• Gas tank: 8-12 years
• Electric tank: 10-15 years
• Tankless gas: 20+ years
• Heat pump: 12-15 years

Warning signs

• Discolored or rusty hot water — anode rod failed, tank corrosion starting
• Rumbling or popping noises — sediment baked onto the bottom
• Reduced hot water capacity — dip tube or thermostat issue
• Visible rust on the tank exterior — usually means inside is worse
• Pooling water around the base — tank is starting to fail
• Higher gas/electric bills with no usage change — efficiency dropping

Repair or replace?

The rule of thumb: if your water heater is past 75% of its expected lifespan AND needs a major repair (anode, tank, dip tube), replace. If it's under 50% and a fix is under $300, repair.