How Often Should a Water Heater Be Serviced?

Your water heater works quietly in the background, providing hot water for showers, dishes, and laundry. Because it is out of sight, it is often out of mind—until you’re hit with a cold shower. To prevent unexpected breakdowns and extend the life of your unit, regular maintenance is essential. But how often should a water heater be serviced?

The Golden Rule: Once a Year

The general consensus among plumbing professionals and manufacturers is that you should have your water heater serviced at least once a year. An annual inspection ensures that all components are functioning correctly and safely.

However, you might need to schedule service more frequently (every 6 months) if:

• You have extremely hard water in your area. Hard water leads to rapid mineral buildup inside the tank.
• Your household uses a very high volume of hot water daily.
• You have a tankless water heater that is heavily used (tankless models are highly susceptible to scaling).

What Does a Professional Service Include?

During an annual water heater maintenance visit, a qualified technician will perform several crucial tasks:

1. Flushing the Tank

Over time, minerals like calcium and magnesium settle at the bottom of the tank, forming a layer of sediment. This sediment makes the heater work harder, reducing efficiency and eventually causing the tank to crack or rust. Flushing the tank removes this buildup.

2. Inspecting the Anode Rod

The anode rod is a sacrificial metal rod suspended inside the tank. It attracts corrosive elements in the water so they eat the rod instead of the steel tank. The technician will check the rod; if it is mostly depleted (usually every 3-5 years), it must be replaced to prevent tank corrosion.

3. Testing the Temperature and Pressure (T&P) Valve

This critical safety valve prevents the tank from exploding if the pressure gets too high. The technician will test it to ensure it opens and closes properly and isn't stuck shut by mineral deposits.

4. Checking Connections and Burners

For gas heaters, the technician will clean the burner assembly, check the pilot light, and ensure the gas connections are secure and venting properly. For electric models, they will test the heating elements and thermostats to ensure they are drawing the correct voltage.

The Benefits of Regular Maintenance

Skipping your annual service might save a little money in the short term, but it will cost you in the long run. Regular servicing offers:

• Longer Lifespan: Well-maintained units can last 10-15 years or more, whereas neglected ones might fail in 7-8 years.
• Lower Energy Bills: A clean, sediment-free water heater heats water faster and uses less energy.
• Fewer Repairs: Annual checks catch small issues before they turn into major emergencies.
• Valid Warranty: Many manufacturers require proof of annual maintenance to keep the warranty valid.