8 Water Heater Maintenance and Repair Tips to Extend Its Service Life

Your water heater is one of the most essential appliances in your home, providing hot water for showers, laundry, dishes, and more. But like any appliance, it needs regular maintenance to operate efficiently and last as long as possible. The good news? With a few simple steps, you can extend the service life of your water heater and avoid costly repairs or premature replacement.

Here are eight expert-approved tips to help you maintain your water heater and keep it running smoothly for years to come:

1. Flush the Tank Annually

Over time, sediment from minerals in your water supply can accumulate at the bottom of the tank. This buildup reduces efficiency and can cause overheating or damage to the tank lining. Flushing the tank once a year helps remove sediment and keeps your water heater operating efficiently.

Neglecting this task can lead to premature failure, which may cost between $900 to $1,800 to replace the unit.

2. Check the Anode Rod

The anode rod is a sacrificial metal rod inside your tank that attracts corrosive elements in the water, preventing them from rusting the tank itself. Over time, the rod corrodes and needs to be inspected or replaced—typically every 3 to 5 years. Inspect it annually and replace it if more than 50% is worn.

3. Test the Pressure Relief Valve

The temperature and pressure relief (T&P) valve is a critical safety feature that prevents your tank from over-pressurizing. To test it, lift the valve’s lever and let it snap back. You should hear a gurgling sound as water is released into the drainpipe. If not, the valve may need replacing.

Failing to maintain this valve can lead to dangerous pressure buildup or even tank rupture.

4. Adjust the Thermostat

Most water heaters are set to 130–140°F by default, but lowering the temperature to 120°F is safer and more energy-efficient for many people. According to the U.S. Department of Energy, reducing your water heater temperature by 10°F can save 3–5% on energy costs.

Lower temperatures also reduce the risk of scalding and slow mineral buildup inside the tank.

5. Insulate the Tank and Pipes

Adding an insulating blanket to your water heater and insulating the first few feet of hot and cold water pipes can reduce heat loss. This not only improves efficiency but also reduces the workload on your water heater, helping it last longer.

Insulation is especially important in colder climates or if your water heater is located in an unheated space like a garage or basement.

6. Schedule Annual Professional Maintenance

Even if you’re diligent with DIY maintenance, it’s wise to have a licensed plumber inspect your water heater annually. A professional can check for leaks, corrosion, faulty components, and perform a full system tune-up.

Regular inspections can extend the performance and overall life of your water heater by 3–5 years.

7. Install a Water Softener (If Needed)

If you live in an area with hard water, mineral buildup can occur more rapidly, reducing your heater’s efficiency and lifespan. Installing a water softener helps reduce calcium and magnesium deposits, protecting both your water heater and plumbing system.

This is especially important for tank-style heaters, which are more susceptible to sediment accumulation.

8. Know When to Replace

Even with the best maintenance, water heaters don’t last forever. Traditional tank water heaters typically last 8–12 years, while tankless models can last up to 20 years. If your heater is approaching the end of its lifespan and showing signs of wear—like rust-colored water, strange noises, or inconsistent heating—it may be time to consider a replacement.

Final Thoughts

Maintaining your water heater doesn’t have to be complicated. With these eight tips, you can extend its lifespan, improve efficiency, and avoid costly repairs. If you’re unsure how to perform any of these tasks or suspect a problem, don’t hesitate to contact Powell’s Plumbing. Our licensed professionals are here to help keep your hot water flowing safely and reliably!