How to fix a water heater that gurgles |

If your water heater is making gurgling noises, it may indicate an issue that needs attention. Here are some steps you can take to troubleshoot and potentially fix the problem:

Turn off the power: If you have an electric water heater, turn off the power supply at the breaker panel. For gas water heaters, turn off the gas supply using the gas valve near the unit.

Allow the water to cool down: Give the water heater some time to cool down before proceeding. Hot water can cause burns, so it's important to exercise caution.

Drain the tank: Attach a garden hose to the drain valve located at the bottom of the water heater tank. Place the other end of the hose in a suitable drainage location, such as a floor drain or outside. Open the drain valve and allow the water to flow out until the tank is fully drained.

Flush the tank: With the drain valve still open, turn on the cold water supply to the water heater. Let the water flow through the tank for a few minutes to flush out any sediment or debris that may have accumulated inside. This can help improve the heater's performance and reduce gurgling noises caused by sediment buildup.

Close the drain valve: Once you've flushed the tank, close the drain valve and disconnect the hose.

Refill the tank: Turn on the cold water supply to the water heater and allow the tank to refill. Keep the hot water faucet in your house open to allow any air trapped in the system to escape.

Restore power or gas supply: If you have an electric water heater, turn the power supply back on at the breaker panel. For gas water heaters, turn on the gas supply and follow the manufacturer's instructions to relight the pilot light.

Monitor the water heater: Once you've completed the above steps, keep an eye on the water heater to see if the gurgling noise persists. If the problem continues, here are some additional steps to continue troubleshooting and fixing a water heater that gurgles:

Check the pressure relief valve: The pressure relief valve is an important safety feature of a water heater. Locate the valve, usually on the top or side of the tank, and lift the lever to release some water. If the gurgling noise stops or decreases, the problem could be related to excessive pressure in the tank. In such cases, you may need to replace the pressure relief valve.

Inspect the dip tube: The dip tube is a plastic tube that directs cold water to the bottom of the tank. If the dip tube is broken or deteriorated, it can cause gurgling noises. Turn off the water supply to the heater, drain the tank, and remove the cold water inlet pipe to inspect the dip tube. If you find any damage, you'll need to replace it with a new one.

Check the anode rod: The anode rod is a sacrificial component that helps prevent corrosion inside the tank. Over time, the rod can become corroded, causing gurgling sounds. To inspect it, turn off the power or gas supply, drain the tank, and locate the anode rod, usually on top of the heater. If the rod is heavily corroded or less than half an inch thick, it should be replaced.

Insulate the pipes: Sometimes gurgling noises can be caused by the expansion and contraction of pipes due to temperature changes. Insulating the hot and cold water pipes connected to the water heater can help reduce these sounds. Use foam pipe insulation sleeves or wrap the pipes with insulating tape.

Regular maintenance: To prevent gurgling noises and ensure the optimal functioning of your water heater, it's important to perform regular maintenance. This includes draining and flushing the tank annually to remove sediment, checking and replacing components as needed, and following the manufacturer's recommendations for maintenance tasks.

If after following these steps the gurgling noise persists, it's advisable to consult a professional plumber who can diagnose the problem accurately and recommend the appropriate repairs or replacements.

Remember to prioritize safety and consult the user manual or seek professional assistance if you are unsure or uncomfortable with any of the steps involved in troubleshooting or repairing your water heater.

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Michael Greene
Michael Greene
Michael Greene is an experienced editor at, where he specializes in water filtration devices. With a knack for writing and advising on water-related issues, Michael has a wealth of knowledge in this area. He is dedicated to helping readers make informed decisions when it comes to water filtration and frequently shares his expertise through engaging and informative content. Michael's attention to detail and passion for ensuring access to clean water has made him an invaluable member of the Guessbest team.