Flushing an Electric Water Heater

Jan 9, 2024


Welcome to Best Service Plumber, your trusted source for professional water heater installation and repair services. In this article, we will guide you through the process of flushing an electric water heater. Regular maintenance, such as flushing, is essential to ensure optimal performance and longevity of your water heater.

Why is Flushing Important?

Before we dive into the flushing process, let's understand why it is crucial for your electric water heater. Over time, sediment and mineral deposits can accumulate at the bottom of the tank, reducing its efficiency and potentially causing damage. Flushing helps remove these deposits, improving energy efficiency and extending the lifespan of your water heater.

Step-by-Step Process: Flushing an Electric Water Heater

Step 1: Prepare the Necessary Equipment

Before you start flushing your electric water heater, make sure you have the following equipment ready:

  • A garden hose long enough to reach a suitable drain location
  • A screwdriver
  • A bucket or a large container to collect the flushed water
  • Rubber gloves and safety goggles to protect yourself

Step 2: Safety First

Ensure your safety by following these precautions:

  • Turn off the power supply to the water heater from the circuit breaker.
  • Shut off the cold-water supply valve to prevent water from entering the tank during the flushing process.
  • Allow the water heater to cool down, as the water inside can be scalding hot.

Step 3: Drain the Tank

Now it's time to drain the tank. Follow these steps:

  1. Locate the drain valve at the bottom of the water heater.
  2. Attach a garden hose to the drain valve and carefully direct the other end to a suitable drain location.
  3. Open the drain valve slowly to start draining the water from the tank. Be cautious as the water might be hot.
  4. Allow the water to completely drain out. This process may take some time, depending on the size of the tank and the amount of sediment present.

Step 4: Flush the Tank

Once the tank is drained, it's time to flush out the remaining sediment:

  1. Closing the drain valve, remove the hose from the valve.
  2. Turn on the cold-water supply valve to allow fresh water to enter the tank.
  3. Let the water flow through the tank and out of the drain valve, flushing away any remaining sediment. You may notice the water running cloudy or discolored initially, but it should clear up as the sediment is flushed out.
  4. Repeat this process a few times until the water runs clear, indicating that the tank is thoroughly flushed.

Step 5: Finish the Flushing Process

Once the tank is successfully flushed, follow these final steps:

  1. Close the drain valve and remove the hose.
  2. Turn on the cold-water supply valve to fill the tank again.
  3. Check for any leaks around the drain valve or other connections.
  4. Finally, restore power to the water heater by flipping the circuit breaker back on.


Congratulations! You have successfully flushed your electric water heater. Regularly flushing your water heater is an essential maintenance task that helps improve efficiency and prolong its lifespan. If you need professional assistance or encounter any issues during the process, don't hesitate to reach out to Best Service Plumber's expert team. We specialize in water heater installation and repair services, ensuring you have hot water when you need it.

Remember, regular maintenance and professional guidance is key to keeping your water heater in top shape. Contact Best Service Plumber for all your water heater and plumbing needs. Trust the experts to get the job done right!

Note: Flushing an electric water heater may vary depending on the specific model and manufacturer's instructions. Always refer to your water heater's manual for detailed guidance.