Home>Gardening & Outdoor>Pool & Spa Care>How To Fix An Airlock In A Hot Tub

How To Fix An Airlock In A Hot Tub How To Fix An Airlock In A Hot Tub

Pool & Spa Care

How To Fix An Airlock In A Hot Tub

Written by: Ethan Hayes

Learn how to fix an airlock in a hot tub with our expert pool and spa care tips. Keep your hot tub running smoothly with our step-by-step guide.

(Many of the links in this article redirect to a specific reviewed product. Your purchase of these products through affiliate links helps to generate commission for Storables.com, at no extra cost. Learn more)


Owning a hot tub is a luxurious and enjoyable experience, but encountering issues such as airlocks can be frustrating. An airlock occurs when an air pocket becomes trapped in the hot tub's plumbing, disrupting the flow of water and potentially causing the pump to malfunction. This can lead to reduced water circulation and heating, affecting the overall performance of the hot tub.

In this comprehensive guide, we will delve into the intricacies of airlocks in hot tubs and provide a step-by-step solution to effectively address this common problem. By understanding the underlying causes and implementing the recommended techniques, you can restore your hot tub to its optimal functionality and continue to indulge in soothing and rejuvenating soaks.

Let's embark on this journey to demystify airlocks and equip ourselves with the knowledge and skills needed to maintain a trouble-free hot tub experience. Whether you are a seasoned hot tub owner or new to the world of hydrotherapy, this guide will empower you to tackle airlocks with confidence and ensure that your hot tub remains a source of relaxation and enjoyment.

Key Takeaways:

  • Don’t let airlocks ruin your hot tub experience! Follow simple steps to release trapped air and restore optimal functionality for uninterrupted relaxation and enjoyment.
  • Prioritize safety, patience, and attention to detail when fixing an airlock in your hot tub. With the right tools and knowledge, you can confidently tackle this common issue and keep your hot tub running smoothly.

Understanding Airlocks in Hot Tubs

Before we delve into the practical steps of fixing an airlock in a hot tub, it’s essential to grasp the underlying mechanisms of this common issue. An airlock occurs when a pocket of air becomes trapped within the hot tub’s plumbing system, hindering the natural flow of water. This can disrupt the pump’s functionality and impede the circulation of water, ultimately impacting the heating process and overall performance of the hot tub.

Several factors can contribute to the formation of airlocks. During the initial filling of the hot tub, air can become trapped in the plumbing if the water is not allowed to flow freely and displace any air pockets. Additionally, when the water level in the hot tub drops significantly, either due to evaporation or drainage, air can enter the system and become trapped, leading to the formation of airlocks.

Understanding the symptoms of an airlock is crucial for prompt identification and resolution. Reduced water flow, unusual gurgling or bubbling noises, and a decrease in water temperature despite the heating system’s operation are common indicators of an airlock. By recognizing these signs, hot tub owners can take proactive measures to address the issue and restore the proper functioning of their beloved relaxation oasis.

By gaining insight into the causes and symptoms of airlocks, hot tub enthusiasts can approach the troubleshooting process with confidence and precision. Armed with this knowledge, we can now proceed to explore the essential tools and materials required to rectify airlocks in hot tubs.

Tools and Materials Needed

Before embarking on the task of fixing an airlock in your hot tub, it’s essential to gather the necessary tools and materials. Having the right equipment at your disposal will streamline the troubleshooting process and ensure a successful resolution. Here’s a comprehensive list of items you’ll need:

  • Garden Hose: A garden hose with a nozzle attachment will be used to fill the hot tub and assist in releasing the airlock.
  • Bucket: A bucket will come in handy for collecting water and facilitating the priming process.
  • Water Source: Ensure access to a nearby water source for refilling the hot tub and assisting in the airlock release.
  • Owner’s Manual: Keep the hot tub’s owner’s manual accessible for reference, especially regarding the specific location of the air release valve.
  • Assistant: If possible, enlist the help of a friend or family member to assist with the troubleshooting process, particularly during the hot tub’s restart phase.

By assembling these tools and materials, you’ll be well-prepared to tackle the task of addressing an airlock in your hot tub. With everything in place, you can proceed to the step-by-step process of releasing the airlock and restoring your hot tub to its optimal functionality. Now that we have the necessary tools and materials at our disposal, let’s move on to the first crucial step in fixing an airlock: shutting off the power to the hot tub.

Step 1: Shut Off the Power

Before initiating any maintenance or troubleshooting procedures, it’s imperative to prioritize safety by shutting off the power to your hot tub. This precautionary measure is crucial to prevent any electrical mishaps and ensure a secure working environment throughout the airlock-fixing process.

Locate the power source for your hot tub and follow the manufacturer’s guidelines to safely power it down. This typically involves switching off the circuit breaker dedicated to the hot tub or disconnecting the tub from its power supply. If you’re unsure about the specific steps for cutting off the power, consult the hot tub’s owner’s manual for detailed instructions.

By deactivating the power supply, you minimize the risk of electrical hazards and create a safe environment for addressing the airlock issue. Remember that safety should always be the foremost consideration when undertaking any maintenance or repair tasks, and shutting off the power is a fundamental step in ensuring a secure work environment.

Once the power has been successfully turned off, you can proceed with confidence to the next step in resolving the airlock in your hot tub. With safety as our top priority, we are now ready to move forward and locate the airlock within the hot tub’s plumbing system.

To fix an airlock in a hot tub, try turning off the power, removing the filter cap, and slowly filling the tub with water to release the air. If that doesn’t work, you may need to bleed the air out of the pump or call a professional for help.

Step 2: Locate the Airlock

After ensuring the safety of the hot tub by shutting off the power, the next step is to locate the airlock within the plumbing system. The airlock is typically found in the piping connected to the hot tub’s circulation pump. It’s essential to identify the precise location of the airlock to effectively release the trapped air and restore the normal flow of water.

Consult the hot tub’s owner’s manual or any documentation provided by the manufacturer to gain insights into the specific layout of the plumbing system and the location of the air release valve. This valve is designed to expel any trapped air from the system and is instrumental in addressing airlocks within the hot tub.

Once you’ve identified the air release valve, visually inspect the surrounding piping to ensure there are no obstructions or blockages that could impede the release of the airlock. Clear any debris or obstacles that may hinder the proper functioning of the air release valve, as this will facilitate a smoother airlock release process.

By familiarizing yourself with the hot tub’s plumbing layout and pinpointing the location of the airlock, you are well-positioned to proceed with the subsequent steps of releasing the trapped air and restoring the optimal functionality of your hot tub. With the airlock located and the pathway to the air release valve clear, we can now move on to the pivotal stage of releasing the trapped air within the plumbing system.

Step 3: Release the Airlock

Releasing the airlock is a critical step in restoring the proper water circulation and functionality of your hot tub. To effectively release the trapped air, you’ll need to follow a systematic approach that involves utilizing a garden hose and the air release valve.

Begin by attaching a garden hose to a nearby water source and carefully filling the hot tub with water. As the tub fills, keep an eye on the air release valve and be prepared to act once the water level reaches the valve. Once the water level is sufficient, open the air release valve to allow any trapped air to escape from the system.

As the air is released, you may notice air bubbles emerging from the water within the hot tub. This is a positive indicator that the airlock is being successfully released, and the water circulation should gradually improve as the air is expelled from the plumbing system.

It’s important to remain patient during this process, as releasing the airlock may take some time, especially if the trapped air pocket is substantial. Monitor the water flow and observe the behavior of the air release valve to gauge the progress of the airlock release. Once the water flow stabilizes and the air release valve ceases to expel air, the airlock has been effectively released.

Throughout this process, it’s beneficial to have an assistant on hand to help monitor the water level, observe the air release valve, and provide support as needed. Clear communication and coordination can enhance the efficiency of releasing the airlock and contribute to a smoother troubleshooting experience.

By diligently following these steps and leveraging the garden hose and air release valve, you can successfully release the airlock within your hot tub’s plumbing system, paving the way for the final step of restarting the hot tub and ensuring its seamless operation.

Step 4: Restart the Hot Tub

With the airlock successfully released and the water circulation restored, the final step involves restarting the hot tub to verify that the issue has been resolved and that the system is functioning optimally. Restarting the hot tub after addressing the airlock is a crucial validation of the effectiveness of the troubleshooting process.

Begin by ensuring that the air release valve is securely closed to prevent any water from escaping the system. Next, carefully restore power to the hot tub by following the manufacturer’s guidelines for reactivating the circuit breaker or reconnecting the power supply.

Once the power is restored, initiate the hot tub’s heating and circulation functions and observe the system’s performance. Pay close attention to the water flow, temperature, and any unusual noises that may indicate lingering issues. It’s normal for the hot tub to take some time to reach the desired temperature, so exercise patience as the heating process commences.

If the hot tub’s pump and heating system operate smoothly and the water circulates effectively without any signs of airlocks or disruptions, then the troubleshooting process has been successful. Congratulations! You’ve effectively addressed the airlock in your hot tub and restored it to its optimal working condition.

However, if you notice any persisting issues such as reduced water flow, abnormal sounds, or inconsistent heating, it may be necessary to revisit the previous steps and ensure that the airlock has been fully released. Thoroughly inspect the air release valve and the plumbing system for any signs of residual airlocks or obstructions that could be impeding the water circulation.

By diligently following these steps and conducting a comprehensive assessment of the hot tub’s performance after the restart, you can confidently conclude the troubleshooting process and relish the rejuvenating experience of a fully functional and airlock-free hot tub.

Armed with the knowledge and skills acquired through this guide, you are well-prepared to tackle airlocks in your hot tub and maintain its optimal performance for uninterrupted relaxation and enjoyment.


Addressing an airlock in a hot tub may initially seem daunting, but armed with the right knowledge and a systematic approach, it can be effectively resolved. By understanding the underlying causes of airlocks, gathering the necessary tools and materials, and following the step-by-step process outlined in this guide, hot tub owners can confidently tackle this common issue and restore their hot tubs to optimal functionality.

Throughout the troubleshooting process, prioritizing safety and meticulous attention to detail are paramount. By shutting off the power, locating the airlock, releasing the trapped air, and restarting the hot tub, hot tub enthusiasts can navigate the troubleshooting journey with confidence and precision.

It’s essential to remain patient and observant during the airlock-fixing process, as releasing trapped air from the plumbing system may take some time. Clear communication and coordination, particularly when using a garden hose and monitoring the air release valve, can significantly contribute to a successful resolution of the airlock issue.

Upon completing the troubleshooting process and restarting the hot tub, a thorough assessment of the system’s performance will confirm the effectiveness of the airlock release. If the hot tub operates smoothly, with consistent water circulation and heating, then the airlock has been successfully addressed, and the hot tub is ready to provide uninterrupted relaxation and rejuvenation.

By demystifying the process of fixing an airlock in a hot tub and empowering hot tub owners with the necessary skills, this guide aims to ensure that the joy of owning a hot tub remains unhindered by common maintenance challenges. With a proactive and informed approach, hot tub enthusiasts can continue to indulge in the soothing and therapeutic benefits of their beloved hot tubs, free from the disruptions of airlocks and plumbing issues.

Embrace the knowledge gained from this guide, and approach the maintenance and care of your hot tub with confidence, knowing that you have the expertise to overcome common challenges and preserve the optimal functionality of your relaxation oasis.

Frequently Asked Questions about How To Fix An Airlock In A Hot Tub

What causes an airlock in a hot tub?

An airlock in a hot tub can be caused by air getting trapped in the pump or the plumbing system. This can happen when you drain and refill the hot tub, or if there is a leak in the system that allows air to enter.
How do I know if my hot tub has an airlock?

You may notice that the water flow in your hot tub is reduced or completely stopped. You might also hear a gurgling or bubbling noise coming from the pump or the plumbing. These are signs that there may be an airlock in your hot tub.
What are the consequences of having an airlock in my hot tub?

An airlock can cause the pump to work harder than it should, which can lead to damage over time. It can also prevent the water from circulating properly, which can result in poor water quality and an uncomfortable hot tub experience.
How can I fix an airlock in my hot tub?

One way to fix an airlock is to prime the pump by manually adding water to the system to push out the air. You can also try using a garden hose to force water through the jets and push out the air. If these methods don’t work, you may need to call a professional to help you.
How can I prevent an airlock from happening in the future?

To prevent an airlock, make sure to properly refill your hot tub after draining it, and check for any leaks in the plumbing system. It’s also a good idea to regularly clean and maintain your hot tub to ensure that the water can flow freely without any obstructions.

Was this page helpful?

At Storables.com, we guarantee accurate and reliable information. Our content, validated by Expert Board Contributors, is crafted following stringent Editorial Policies. We're committed to providing you with well-researched, expert-backed insights for all your informational needs.


0 thoughts on “How To Fix An Airlock In A Hot Tub

Leave a Comment

Your email address will not be published. Required fields are marked *

Related Post