How to Fix an Airlock in a Mixer Tap

If you're experiencing low water pressure, air bubbles, or inconsistent flow from your mixer tap, it might be due to an airlock. An airlock occurs when air becomes trapped within the plumbing system, preventing water from flowing freely. Fortunately, fixing an airlock is a straightforward process that can often be done with basic tools and a little patience. In this guide, we'll walk you through the steps to resolve this common plumbing issue and restore normal water flow to your mixer tap.

How to Fix an Airlock in a Mixer Tap

Understanding What an Airlock Is

Before diving into the repair process, it’s helpful to understand what an airlock is and how it affects your plumbing system. An airlock occurs when air becomes trapped in the pipes, often at high points or in sections where the water flow is obstructed. This trapped air prevents water from moving smoothly through the pipes, resulting in reduced water pressure or complete blockage at the tap.

Airlocks are common after plumbing work, maintenance, or when the water supply has been turned off and then turned back on. They can also develop if there’s a sudden change in water pressure or if pipes have been improperly installed.

Signs of an Airlock in a Mixer Tap

• Low or no water flow from the tap
• Disrupted or inconsistent water flow
• Gurgling sounds when opening or closing the tap
• Water flow stops suddenly and then resumes

If you notice these symptoms, an airlock is likely the culprit. Addressing it promptly can prevent further issues and restore normal function.

Tools and Materials Needed

• Adjustable spanner or wrench
• Bucket or tray
• Rubber gloves (optional)
• Replacement washers or O-rings (if necessary)
• Silicone or plumber’s tape (optional)
• Pipe or garden hose (if needed for flushing)

Step-by-Step Guide to Fix an Airlock in a Mixer Tap

Follow these steps carefully to release the trapped air and restore proper water flow:

1. Turn Off the Water Supply

Locate the shut-off valves under the sink or the main water supply and turn them off to prevent water from flowing while you work. Turn the tap on to drain any residual water and reduce pressure.

2. Prepare Your Workspace

Place a bucket or tray beneath the tap or pipe connections to catch any drips or residual water. Wear gloves if desired for better grip and hygiene.

3. Disconnect the Mixer Tap

Using an adjustable spanner, loosen the fittings connecting the tap to the water supply. Carefully detach the hoses or pipes, noting their orientation for reassembly.

4. Check for Obstructions and Air Pockets

Inspect the inlet pipes and the tap for any visible debris or blockages. If the pipes are accessible, gently shake or tap them to dislodge trapped air or debris. Sometimes, the airlock is localized at the inlet or within the tap itself.

5. Refill and Bleed the System

• Reconnect the hoses or pipes temporarily without tightening fully.
• Turn on the water supply slowly to allow water to flow into the system, pushing any trapped air out.
• Open the tap gradually to let air escape with the water. You may hear sputtering or bubbling as the air is expelled.

6. Fully Reassemble and Test

Once water flows steadily without sputtering or air bubbles, tighten all fittings securely. Turn off the tap, then turn the water supply back on fully. Open the tap to check if water pressure has been restored to normal.

7. Flush the System (Optional)

If the airlock persists, you might need to flush the pipes:

• Reconnect the supply hoses to the tap.
• Use a hose to run water through the system, forcing out remaining air pockets.
• Repeat the bleeding process if necessary.

8. Replace Damaged Parts (If Needed)

If you notice worn washers, O-rings, or damaged components during your inspection, replace them with new parts to ensure a proper seal and prevent future issues.

Tips for Preventing Future Airlocks

• Always turn off water supplies slowly to avoid creating air pockets.
• Regularly check and maintain your plumbing fittings and washers.
• After any plumbing work, bleed the system to remove trapped air.
• Ensure pipes are properly installed and secured to prevent air pockets at high points.

When to Call a Professional Plumber

While fixing an airlock is often straightforward, certain situations may require professional assistance:

• If you cannot access the affected pipes or tap components
• If the problem persists after multiple attempts to bleed the system
• If you suspect a more serious plumbing issue, such as pipe damage or blockage deeper within the system
• If you’re unsure about working with plumbing fittings or water supply components

In such cases, contacting a licensed plumber ensures the issue is resolved safely and effectively.

Conclusion: Restoring Your Mixer Tap to Full Functionality

Dealing with an airlock in your mixer tap doesn’t have to be a daunting task. By understanding what causes an airlock and following the step-by-step process outlined above, you can quickly resolve the issue and enjoy steady water flow again. Remember to turn off the water supply carefully, bleed the system thoroughly, and replace any worn components as needed. Regular maintenance and proper handling during plumbing work can help prevent airlocks from forming in the future. If problems persist or you're uncomfortable performing the repair yourself, don’t hesitate to seek professional plumbing assistance for a safe and lasting solution.