How to Blow Out Swimming Pool Lines

Are you ready to properly prepare your swimming pool for winter? In this article, we'll show you how to blow out your pool lines, an essential step in preventing freezing and potential damage.

You'll learn the importance of this process, how to get ready for it, and a step-by-step guide to ensure a successful blowout.

Don't let frozen pool lines ruin your next summer season. Let's get started!

Understanding the Importance of Blowing Out Pool Lines

You need to understand the importance of blowing out your pool lines.

Pool lines play a crucial role in maintaining the cleanliness and functionality of your pool.

By blowing out the lines, you can remove any water and debris that may cause damage during the winter months.

Neglecting this step can lead to costly repairs and potentially render your pool unusable in the future.

The Role of Pool Lines in Pool Maintenance

Understanding the importance of blowing out pool lines plays a crucial role in maintaining the overall condition and functionality of your swimming pool. Pool lines serve as the arteries of your pool, carrying water to and from the filtration system and various pool equipment. Regular maintenance, such as blowing out the lines, ensures that they remain free from debris and potential clogs.

By removing any stagnant water and preventing freezing during winter months, you can avoid costly repairs and extend the lifespan of your pool lines. Blowing out pool lines involves using compressed air to forcefully remove water from the lines, effectively preparing your swimming pool for the off-season or any necessary repairs.

This maintenance task should be included in your regular pool maintenance routine to ensure optimal performance and longevity of your pool lines.

Why Blowing Out Pool Lines is Necessary

Blowing out pool lines is crucial for maintaining the overall condition and functionality of your swimming pool. When winterizing your pool, it's important to drain the water from the lines to prevent freezing and potential damage.


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By blowing out the pool lines, you ensure that all the water is removed, including from the drain plugs, returns, and return lines. This process involves using a shop vac or pool pump to force air through the lines and expel any remaining water.

It's also essential to close the valves and lower the water level before starting the blowing out process. By properly blowing out pool lines, you can prevent expensive repairs and ensure that your pool is ready for the winter season.

Potential Consequences of Not Blowing Out Pool Lines

Neglecting to blow out pool lines can result in costly damages to your swimming pool. When you fail to drain blow the drain lines and drain water from your pool, you leave them vulnerable to freezing temperatures during the winterization process. This can lead to cracked pipes, burst fittings, and a damaged drain valve.

The line-blowing process is crucial as it removes any remaining water from the lines, preventing them from freezing and causing further damage. Without properly blowing out the pool lines, you risk a suction side leak, which can lead to water loss and an inefficient pool system.

Preparing to Blow Out Pool Lines

Before you start blowing out your pool lines, make sure you have all the necessary tools and equipment, such as an air compressor and a blowout plug.

Additionally, it's important to take safety precautions and measures, such as wearing protective eyewear and gloves, to avoid any accidents or injuries during the process.

Lastly, take the time to understand your pool's plumbing system, including the location of the main drain and the return lines, to ensure an efficient and thorough blowout.

Necessary Tools and Equipment

Gather all the tools and equipment you need to prepare for blowing out your swimming pool lines. Here is a list of the necessary items:

  • Air compressor: This will provide the necessary pressure to blow out the lines effectively.
  • Air blower: Attach this to the air compressor to direct the air into the pool lines.
  • Port adapter: Connect the air blower to the pool lines using a port adapter.
  • Skimmer line plug: Insert this plug into the skimmer line to prevent air bubbles from escaping.
  • Return jet plug: Place this plug into the return jets to prevent air from escaping.

By having these tools and equipment ready, you'll be able to remove all the pool water from the lines, preventing any potential damage caused by freezing temperatures.

Remember to follow the manufacturer's instructions when using the air compressor and other tools for a safe and successful pool line blowout.


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Safety Precautions and Measures

To ensure a safe and successful pool line blowout, it's important to take necessary safety precautions and measures while preparing for the task. Before starting, make sure to turn off the pool equipment and disconnect the power to avoid any accidents.

Check the pool water levels and ensure they're below the skimmer and return lines. This will prevent any water from entering the suction lines during the blowout process. Additionally, remove the filter drain plug to allow for proper drainage.

Use pool line blowers designed specifically for this task, as they're equipped with the necessary power and pressure to clear the pool plumbing lines effectively.

If you're unsure about the process, it's best to hire a professional pool service company to handle the blowout for you, ensuring the safety of your pool and equipment.

Understanding Your Pool's Plumbing System

To properly prepare to blow out your pool lines, it's important to have a clear understanding of your pool's plumbing system.

The pool filter is a crucial component of the system, as it helps to remove debris and keep the water clean.

Before blowing out the lines, make sure to clean the pump basket and skimmer baskets to ensure proper air flow.

It's also important to understand the function of the filter valve, which controls the flow of water through the system.

Before starting the process, ensure that the pump lid is securely tightened and that the skimmer hole is clear of any obstructions.

Step-by-Step Guide to Blowing Out Pool Lines

To begin blowing out your pool lines, start by draining the pool to the correct level.

Then, attach the air compressor to the pool lines using the appropriate fittings.

Once everything is properly connected, you can proceed to blow out the main drain line.

Next, blow out the skimmer lines.

Draining the Pool to the Correct Level

You can drain your pool to the correct level by following this step-by-step guide to blowing out pool lines.

  1. Start by locating the drain hole or drain pipe in your pool.
  2. Make sure the drain setting is set to the correct position to allow water to flow out.
  3. Connect a hose to the drain hole or drain pipe and direct it away from the pool area.
  4. Turn on the drain suction to start the draining process.
  5. While the pool is draining, don't forget to remove any remaining water from the filter drain and heater drain plugs.

Once the pool is drained to the desired level, you can proceed with the actual line-blowing process. Remember, draining your pool can be a time-consuming and expensive process, so it's important to follow these steps carefully to avoid any unnecessary complications.

Attaching the Air Compressor to the Pool Lines

How can you effectively attach the air compressor to the pool lines when blowing them out?

Before you begin, make sure to turn off the pool blower, pool heater, and any other equipment connected to the pool lines.

Start by locating the spa drain or the vacuum port, usually found at the pool equipment pad.

Attach the air compressor hose securely to the spa drain or vacuum port. Ensure a tight seal to prevent any air leaks.

Once the hose is attached, turn on the air compressor and set it to a low pressure. Slowly increase the pressure until you reach the desired level, which is typically around 30 psi.

Keep a close eye on the pressure gauge to avoid exceeding the recommended limit.

Blowing Out the Main Drain Line

To effectively blow out the main drain line in your swimming pool, start by ensuring that all pool equipment connected to the line is turned off. This includes the pool pump, filter, and any other devices that may be connected.

Next, you'll need to connect the air compressor to the main drain line. There are different canister types available for this purpose, so make sure you choose the one that's compatible with your pool setup.

Once the connection is secure, turn on the air compressor and gradually increase the pressure to blow out the main drain line. Be careful not to exceed the recommended pressure, as this could cause damage to the line or other components.

As you blow out the line, you may notice a plume of air rise from the pool. This is normal and indicates that the line is being properly cleared. Keep a close eye on the pressure gauge to ensure consistent pressure throughout the process.

If you detect any water leak or unusual resistance, stop immediately and contact a pool company for assistance.

It's important to blow out the main drain line, along with other pool lines, before the winter months to prevent any potential damage caused by freezing water.

Blowing Out the Skimmer Lines

To effectively blow out the skimmer lines in your swimming pool, start by ensuring that all pool equipment connected to the lines is turned off. This includes the pool pump, heater, and any other accessories.

Next, locate the skimmer ports on the pool liner and remove the baskets. This will prevent any debris from getting sucked into the lines during the blowout process.

Once the baskets are removed, position the slide valves in the correct position to allow air to flow through the skimmer lines. Attach the air compressor to the skimmer ports and gradually increase the pressure until you notice air bubbles coming out of the skimmer basket. This indicates that the lines are being properly blown out.

Continue the process for each skimmer line, checking for any signs of leaks or issues along the way.

Blowing Out the Return Lines

Now let's move on to blowing out the return lines to complete the process of preparing your swimming pool for the winter season.

Blowing out the return lines is an essential step to ensure that no water remains in these lines, which could freeze and cause damage during the winter months.

To do this, you'll need a piece of equipment called a blow out plug. Attach the blow out plug to the return line and use a compressor or a shop vac to blow air through the line. The air will push out any remaining water, creating a column of air in the line.

It's important to note that you should never use chemicals to blow out swimming pool lines as they may cause damage.

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Plugging the Lines After Blowing Them Out

After blowing out the return lines, the next step in the process of preparing your swimming pool for winter is to plug the lines. Plugging the lines after blowing them out is important to prevent any water from entering the lines and causing damage during the winter months.

To start, you'll need to locate the different lines in your swimming pool system, including the vacuum lines, sand filter, and cartridge filter. Once located, you can use skimmer plugs or other appropriate plugs to seal off these lines. Make sure to securely attach the plugs to ensure a tight seal.

Troubleshooting Common Issues

Having trouble getting all the water out of your pool lines? Don't worry, we've got you covered.

In this section, we'll address some common issues you may encounter during the blowing out process and provide solutions for dealing with stubborn water in the lines, lines that won't blow out, and leaks that may arise along the way.

Dealing with Stubborn Water in the Lines

To effectively deal with stubborn water in the lines, you can use a submersible pump to remove any remaining water before proceeding with the blowing out process. Sometimes, despite your best efforts, there may still be water trapped in the lines. This can happen due to various reasons, such as low water pressure or clogs in the plumbing system.

If you encounter stubborn water in the lines, don't panic. Start by attaching a submersible pump to the lowest point of the pool's plumbing system. Make sure the pump is fully submerged and turn it on. The pump will help remove the remaining water from the lines, ensuring a successful blow out. Keep an eye on the pump's progress and continue until no more water is being pumped out.

Once all the water is removed, you can proceed with the blowing out process to prepare your swimming pool lines for winter.

What to Do if a Line Won't Blow Out

If a line won't blow out, you may occasionally need to manually clear the obstruction. One common issue is blockage in the incoming lines. To fix this, turn off the pool pump and disconnect the affected line.

Use a spa blower or compressed air to blow out the line in the opposite direction of water flow.

Another option is to contact a professional pool service or pool expert like Swimming Pool Steve. They have the expertise and tools to troubleshoot and resolve complex issues.

If the problem persists, it could be due to a more significant blockage or damage in the line. In this case, it's recommended to reach out to a professional pool blower or pool operation management for further assistance.

Handling Leaks During the Process

To address leaks that may occur during the process, continue by checking for any visible cracks or damage in the pool lines. Inspect the lines carefully, focusing on areas where the pipes connect to the pool equipment or where they are exposed to potential damage. If you notice any cracks or damage, you will need to repair or replace the affected section of the pool lines before proceeding with blowing them out.

Here are some troubleshooting tips for handling leaks during the process:

Issue Possible Cause Solution
Low air pressure Problem with compressor Check compressor for any issues and ensure it is providing enough pressure
Water leakage Cracked or damaged pool lines Repair or replace the affected section of the pool lines
Air escaping Loose connections Tighten all connections to prevent air from escaping

Maintaining Pool Lines Post-Blowout

Now that you've successfully blown out your swimming pool lines, it's important to stay on top of regular maintenance to keep them in optimal condition.

This includes checking for any signs that your pool lines may need attention, such as leaks or reduced water flow.

If you notice any issues, don't hesitate to call a professional for help to ensure that your pool lines continue to function properly.

Regular Maintenance Tips

To maintain your pool lines after a blowout, regularly perform the necessary maintenance tasks.

This will help keep your lines clean and prevent any further damage. One important task is to regularly check for any leaks or cracks in the lines. If you notice any, make sure to repair them immediately to avoid any water loss.

Additionally, it's important to clean the lines regularly to remove any debris or buildup that may accumulate over time. This can be done by using a pool line cleaner or by flushing the lines with water.

Lastly, make sure to regularly check the water pressure in your pool lines to ensure they're functioning properly.

Signs That Your Pool Lines Need Attention

Are you wondering how to identify if your pool lines need attention after a blowout? There are a few signs you can look out for to ensure your pool lines are in good condition.

First, check for any drain bubbles when you turn on the pump. If you notice bubbles coming from the drain, it may indicate a leak in the pool lines.

Another sign is a decrease in flow from the jets. If you notice that the water isn't flowing as strongly as before, it could be a sign of a blockage or damage in the pool lines.

Additionally, check the equalizer port for any water leaks. If you see water coming out of the equalizer port, it's a clear indication that your pool lines need attention.

Keep an eye out for these signs to ensure your pool lines are properly maintained post-blowout.

When to Call a Professional for Help

If you notice any signs of damage or blockage in your pool lines post-blowout, it's time to consider calling in a professional for assistance. While blowing out your swimming pool lines can help prevent damage from freezing temperatures, sometimes issues may arise that require expert attention.

If you notice leaks, cracks, or any other visible damage in your pool lines, it's best to seek professional help. Attempting to fix these problems on your own may lead to further damage or even injury.

Additionally, if you experience persistent blockages or reduced water flow, it's a good idea to call a professional. They have the knowledge and tools to diagnose and address any issues efficiently, ensuring your pool lines remain in optimal condition.

Don't hesitate to reach out to a professional for help when needed.

Frequently Asked Questions

Can I Blow Out My Pool Lines Without Any Special Equipment?

You can blow out your pool lines without any special equipment. Just use a shop vacuum or an air compressor with a blow out attachment. Make sure to follow the proper steps to avoid any damage.

How Often Do I Need to Blow Out My Pool Lines?

You need to blow out your pool lines at least once a year. This will help prevent damage from freezing temperatures and keep your pool system in good working condition.

Can I Use a Leaf Blower to Blow Out My Pool Lines?

Yes, you can use a leaf blower to blow out your pool lines. It's a convenient and effective method. Just be sure to use the right attachments and follow proper safety precautions.

What Should I Do if I Accidentally Blow Out a Pool Line Too Forcefully?

If you accidentally blow out a pool line too forcefully, immediately turn off the blower and shut off the water pump. Call a professional to assess the damage and make necessary repairs.

Can I Use a Shop Vac to Blow Out My Pool Lines Instead of an Air Compressor?

Yes, you can use a shop vac to blow out your pool lines instead of an air compressor. However, make sure to adjust the power setting to prevent any damage to the lines.

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Mike Hunter

Mike is the owner of the local pool shop. He's been in the business for over 20 years and knows everything there is to know about pools. He's always happy to help his customers with whatever they need, whether it's advice on pool maintenance or choosing the right chemicals. He's also a bit of a pool expert, and is always happy to share his knowledge with anyone who's interested.

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