how to bleed hot water heater

Daniel Parker

3 min read

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18-01-2025

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Hot water heaters, while essential, can sometimes develop air pockets that hinder their efficiency and performance. These air pockets can cause rumbling noises, reduced hot water flow, and even damage the unit over time. Bleeding your hot water heater, a simple process, removes this trapped air, restoring optimal performance. This guide will walk you through how to bleed a hot water heater safely and effectively.

Understanding Why You Need to Bleed Your Hot Water Heater

Before diving into the process, let's understand why bleeding your water heater is necessary. Air trapped inside the tank can:

• Reduce hot water flow: Air compresses, restricting water movement.
• Cause rumbling or knocking noises: Air expands and contracts with temperature changes, leading to disruptive sounds.
• Decrease efficiency: The heater works harder to heat the air, wasting energy.
• Potentially damage the unit: Over time, air can cause corrosion and reduce the lifespan of your water heater.

If you notice any of these issues, bleeding your hot water heater might be the solution.

Tools You'll Need

Before you begin, gather the necessary tools. This will make the process smoother and safer. You'll need:

• Bucket: To collect the water draining from the bleed valve.
• Wrench (usually an adjustable wrench): To open the bleed valve. The size will depend on your water heater model.
• Towels: To clean up any spills.

Step-by-Step Guide on How to Bleed Your Hot Water Heater

Follow these steps carefully to bleed your hot water heater correctly.

Step 1: Locate the Bleed Valve

The bleed valve is typically located at the top of your hot water heater, near the temperature and pressure relief valve. It's usually a small valve with a small pipe extending from it.

Step 2: Prepare Your Work Area

Place the bucket under the bleed valve to catch the water. Lay down towels to absorb any potential spills. It's a good idea to wear old clothes as well.

Step 3: Turn Off the Water Heater

Turn off the power to your electric water heater or the gas supply to your gas water heater. This is a crucial safety precaution.

Step 4: Open the Bleed Valve Slowly

Use the wrench to carefully open the bleed valve. Turn it counterclockwise. You'll hear air escaping, followed by water. Let the water run until a steady stream flows out without any air bubbles.

Step 5: Close the Bleed Valve

Once the water flows consistently without air bubbles, close the bleed valve by turning it clockwise.

Step 6: Check for Leaks

Inspect the area around the bleed valve for any leaks. Wipe up any spills immediately.

Step 7: Turn the Water Heater Back On

Once you've confirmed no leaks are present, restore the power (electric) or gas supply to your water heater.

Troubleshooting Common Issues

• No Water Coming Out: The valve might be stuck. Try using penetrating oil and letting it sit for a few minutes before trying again. If the problem persists, you may need a professional plumber.
• Continuous Air Bubbles: There might be a larger air pocket. You may need to repeat the bleeding process several times.

When to Call a Plumber

While bleeding a hot water heater is a relatively simple task, there are instances when it's best to call a professional plumber:

• If you're uncomfortable performing this task yourself.
• If you cannot locate the bleed valve or are unsure about its function.
• If you experience recurring issues after bleeding the heater.
• If you notice any significant leaks or damage to the water heater.

Regular maintenance, including bleeding your hot water heater periodically, can extend its lifespan and improve its performance. By following these steps, you can ensure your hot water system runs smoothly and efficiently for years to come. Remember safety first!