How to Fix Air in a Pool Pump: A Step-by-Step Guide

If you've noticed air bubbles coming out of the return jets in your pool, it's not just a quirky sight—it's a sign that something is wrong with your pool's filtration system. Air in the pool pump can disrupt the normal water flow and cause inefficiencies in cleaning and circulation. Fortunately, this is a common issue and can be easily resolved with some basic troubleshooting.

Here’s a comprehensive guide to help you identify the causes of air in your pool pump and how to fix it, ensuring your pool is back to crystal-clear condition in no time.

Why Is There Air in the Pool Pump?

Air bubbles appearing in your pool are typically caused by air entering the system through the suction side of the pump. There are several areas to check when diagnosing the issue, and these are usually straightforward fixes.

1. Check the Pool’s Water Level

First things first, make sure the water level in your pool is at the proper height. If the water level is too low, your skimmers may start drawing in air, causing the bubbles. The water level should be around the middle of the skimmer’s opening. A simple adjustment here can often solve the problem.

2. Inspect the Skimmer and Skimmer Basket

The skimmer is where water enters your pool’s filtration system, so if there's an issue here, air can easily be drawn into the system. Start by checking the skimmer basket. Ensure that it’s not damaged or clogged with debris. A damaged or improperly seated basket can lead to suction problems. Also, inspect the weir (the flap or door at the skimmer’s entrance). If it’s jammed, it could affect water flow and let air in. Ensure it moves freely or consider installing one if your skimmer doesn’t have one.

3. Examine the Pool Pump Lid and O-Ring

Another common culprit for air in the pool pump is the pump lid and its O-ring. A cracked lid or a worn-out O-ring can cause air to leak into the system. To check the O-ring, turn off the pump, remove the lid, and carefully examine the O-ring for cracks. If the O-ring appears cracked or dry, replace it. For added protection, lubricate the O-ring with a Teflon-based lubricant before reinstalling the lid. This will ensure a tighter seal and prevent future leaks.

4. Inspect the Pump Basket

A cracked or improperly seated pump basket can also lead to air leaks. If the basket isn’t correctly positioned or has visible damage, replace it. Make sure the basket is always cleaned and properly seated during routine maintenance to prevent air from entering the pump system.

5. Check the Pump’s Drain Plugs

Pool pumps often have one or more drain plugs located on the housing. If these plugs are loose or leaking, they could let air in. Check each plug and ensure they are tight and secure. If necessary, apply Teflon pipe tape to the threads to create a tighter seal and prevent leaks.

6. Inspect Unions in the Plumbing

If you have an inground pool, your plumbing may include unions—threaded connectors that allow for easy maintenance or replacement of equipment. Inside these unions, there are O-rings that can wear out or become damaged over time. Check the O-rings for cracks and ensure they are seated properly within their grooves. If the O-ring is out of place, it can let air into the system, leading to bubbles in the pool.

7. Prime the Pool Pump

After performing any maintenance, it's important to prime the pool pump. This step is necessary to remove any trapped air in the system and ensure proper water flow. Follow the manufacturer’s instructions for priming, as the process can vary depending on the model of your pump.

Conclusion

Air bubbles in your pool may seem like a minor issue, but addressing them promptly can prevent more significant problems down the line. By following these troubleshooting steps, you’ll be able to identify the source of the air in your pool pump and restore normal operation. If you continue to experience issues, it may be worth consulting a professional to inspect your system. With regular maintenance and attention, your pool will stay clear and efficiently filtered all season long.

Stay on top of your pool care with AQUASTRONG’s high-performance equipment to keep your pool in optimal condition year-round.