When it comes to keeping your home comfortable, few appliances are as important as your water heater. From hot showers to clean dishes, it works behind the scenes every day. But how long do water heaters really last—and when should you think about replacing yours? At Very Good Plumbing, we’ve helped countless San Antonio homeowners (and neighbors in Helotes, Boerne, and Schertz) get the most out of their water heaters, so let’s break it down.

Average Lifespan of a Water Heater

The lifespan of a water heater depends on its type, usage, and maintenance. Here’s what you can expect:

• Traditional Tank Water Heaters:
• Typically last 8–12 years. With proper care (like annual flushing), some can make it closer to 15 years.
• Tankless Water Heaters:
• These units can last 15–20 years or more since they heat water on demand and don’t store it in a tank.
• Factors That Impact Lifespan:
• Water quality: Hard water in the San Antonio area can lead to faster mineral buildup.
• Maintenance: Regular flushing, anode rod replacement, and inspections extend life.
• Usage habits: The more hot water your household demands, the harder your system works.

Signs Your Water Heater May Be Failing

Even if your water heater hasn’t hit the average end of its life, it may show signs it’s time for repair or replacement. Look out for:

• Inconsistent water temperature (hot one minute, cold the next)
• Strange noises (popping, banging, or rumbling from sediment buildup)
• Rust-colored water or visible corrosion on the tank
• Water leaks around the base of the unit
• Age over 10 years for tank units (especially without regular maintenance)

If you notice these issues, it’s better to call a licensed plumber sooner rather than later. Small problems can turn into emergency replacements quickly.

Extending the Life of Your Water Heater

The good news? With the right care, you can maximize your water heater’s lifespan:

1. Annual flushing: Removes sediment that causes corrosion and noise.
2. Check the anode rod: This part prevents rust but wears out over time.
3. Install a water softener: In San Antonio and surrounding areas, this reduces hard water damage.
4. Professional inspections: Catch small issues before they cause a breakdown.

Repair vs. Replace: What’s Best?

• Repair: If your water heater is under 8 years old and the problem is minor (like a bad heating element or thermostat), repair may be the best choice.
• Replace: If it’s 10+ years old, leaking, or facing frequent issues, replacement is often more cost-effective in the long run.

Not sure? Our plumbers can inspect your system and give honest advice on whether repair or replacement makes the most sense for your home.

Trust the Local Experts in San Antonio

At Very Good Plumbing, we provide water heater repairs, replacements, and new installs throughout San Antonio, Helotes, Boerne, Schertz, and the surrounding areas. With over a decade of plumbing experience, we pride ourselves on honesty, reliability, and quality work that keeps your home running smoothly.

👉 Learn more about who we are

Final Thoughts

So, how long do water heaters last? On average, 8–12 years for traditional tanks and up to 20 years for tankless units—if they’re properly maintained. Keeping up with routine service and knowing the warning signs can save you money, prevent emergencies, and keep hot water flowing in your home.

If you’re experiencing water heater issues or wondering if it’s time for a replacement, give Very Good Plumbing a call today. We’re here to help San Antonio homeowners with fast, friendly, and expert plumbing services.