How to Repair an Air Leak in a Swimming Pool Filter


No matter what type of pool filter you purchase -- sand, diatomaceous earth or cartridge -- your filter must operate in a complete vacuum environment. If air gets into the pool filtration system, the pool filter stops operating optimally. In some cases, depending on how much air there is in the system, it may not operate at all. If you have an air leak in your swimming pool filter, it's important to correct it quickly. When searching for air leaks, start with the easiest and most accessible area.

Things You'll Need

  • Plumber's tape
  • Check all of the pool hose connections to see if they are leaking. Leaky hoses allow air to get into the system. Tighten the connection if you detect a leak. Apply plumber's tape to the male end of a screw-on hose before tightening.

  • Evaluate the pool water level -- if it is allowed to drop too low, air can get into the pool filter system through the skimmer. The water level should be no lower than the middle of the skimmer faceplate. Add more water to the pool if the level is too low.

  • Examine the pool pump basket -- a low water level can affect the vacuum environment in the pool filter. Turn off the pool filter. Open the lid on the pump basket, which will allow water to flow into it. Close the lid when the pump basket is full. Turn the filter back on.

  • Open the pressure relief valve on the top of the pool filter and run the filter system to allow trapped air to escape. Close the pressure relief valve when you see a steady stream of water pouring through it, indicating all the air has escaped.

  • Examine the ground underneath the pool pump and filter for wet spots. An unexplained wet spot underneath the filter system is evidence of a leak. It might just be a loose connection or a seal that needs to be replaced. Take note of the exact location of the leak to help pinpoint the problem. If the leak is caused by an in internal part failure, you may need to have your system repaired by a professional.

Tips & Warnings

  • When looking for leaks underneath the filter system, make sure to differentiate between the pump and the filter housing. Pool filter housing problems usually can be fixed in-house. However, because of the delicate electronic components of a pool pump, you should take a pump to a qualified service technician for repairs.

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  • Photo Credit Yasinguneysu/Photodisc/Getty Images
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