A Detailed Guide on How to Flush A Tankless Water Heater

How to Flush A Tankless Water Heater

Are you worried about how to clean a tankless water heater? If yes, then we will guide you on how to flush a tankless water heater. They usually build up debris and calcium inside the appliance, so make sure you flush the electric water heater at least once a year. It is really important to clean and perform simple maintenance as it improves the efficiency and life span of your water heater.

In this blog, we will give you a detailed guide on how to flush a tankless water heater. But it is also important to understand the fact that why it is essential to flush. We have listed a few reasons below:

  • Debris and calcium build-up inside can wreak havoc on the internal parts of your expensive water heater. The limescale can cause serious damage, so it is always a better idea to flush a gas water heater.
  • If you let the limescale accumulate, then it will only reduce the lifespan of the water heater.
  • Most of the companies do not provide a warranty against the damage caused by the limescale build up.
  • You must be already aware that the heat exchanger is extremely delicate to build up of limescale. You must not be careless as even a small amount can affect the water heater’s efficiency, increase the fuel cost and its performance.

How to Flush A Tankless Water Heater?

  • Don’t Forget To Shut The Power Source

Make sure you turn off the power of your tankless water heater before start cleaning it. You can shut off the circuit breaker or gas of your device. Don’t forget to also shut off the 3 water valves. By doing this, you will avert cold water from running into the tankless heater and prevent hot water from coming out.

  • Ensure To Locate The Shutoff Valves

This is the second step to make sure you locate the shutoff valves. You will notice that they are color-coded handles under the water heater. These handles will shut down the flow of gas and water to your tankless water heater. If you notice that the handles are in-line, and then it indicates that it is on and if it is perpendicular to the pipe, then it is off. Don’t forget to
turn them off by sliding it perpendicular to the pipes. By doing this, you will switch off the gas, the hot water flow, and the cold water flow. After turning it off, you can unplug your tankless heater from the wall.

  • Remove The Purge Port Valve Caps

This is the next step to remove the purge port valve caps slowly. Make sure you do this step carefully as it prevents excess hot water from flowing out of the water heater. You might face pressure when you will remove the caps, but it is highly suggested that you ensure that the hot water is completely out as it will prevent it from coming into contact with your skin. Do it with the utmost sincerity and handle each cap carefully.

  • Use Undiluted White Vinegar And A Pump To Clean Your Tankless Heater

This is the last step and by doing this you will complete the process of flushing your tankless water heater. You will need 2.5 gallons of undiluted white vinegar and a pump to clean your tankless water heater. The next step is to attach the hose into the blue valve and ensure that all connections are holding on tightly. You don’t have to plug the pump as yet as you have to first place the pump into the vinegar. Only then, you can plug it into the wall socket. Just be careful and ensure that the hose goes into the hot water valve before you plug the pump into the device. Once the hoses are attached and the pump in dipped in the vinegar, you can start the process of cleaning.

Now, after doing the above steps, you can finally plug in the pump and start circulating the vinegar in the valves. It is to be noted that you have to leave this for at least 60 minutes. However, the manual states to leave it for only 45 minutes, but we urge you to leave at least for an hour and see the changes.

After performing all the above steps, you will clean your tank less water heater properly and enhance its performance. We are certain about the fact that after reading this blog, you will learn how to maintain your tank less water heater and avoid accumulating lime scale and debris. The maintenance process will also increase the lifespan and efficiency of the heater. Just ensure that you do not flush the tank less water heater before switching off the power as it can severely damage the appliance.

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