Poolking, your best swimming pool equipment manufacturer and supplier with more than 20 years experience.                                                                              +8613922334815


why does my pool filter leak water



Having a pool at home is a great way to enjoy the warm summer days. But, maintaining a pool can be a task, and finding your pool filter leaking water can be frustrating. There could be a variety of reasons why your pool filter may be leaking. In this article, we will be discussing the potential causes of a pool filter leak, how to troubleshoot the leak, and how to fix it.

1. The O-ring

The O-ring is a small rubber ring located at the top of the pool filter. It helps seal the filter and keep it from leaking. The O-ring can become damaged or worn over time, causing it to lose its sealing capabilities. An improper fit of the O-ring can also be a culprit.

Solution: The solution to this issue is to replace the O-ring. Finding the right size of the O-ring is essential. If the size is incorrect, it can lead to further complications. The O-ring should be inspected annually, and any sign of damage should be addressed promptly.

2. Pressure

The pressure within your pool filter could be another cause of water leaking. When the pressure within the pool filter is excessively high, it can cause the filter's housing to rupture, leading to water leaks. If you have a sand filter, a wrong filter media level can cause high pressure and subsequent leaks.

Solution: Check the pressure gauge regularly. The ideal pressure should be between 8-10 pounds per square inch (psi). If the pressure is above 10 psi, perform backwash, and clean the filter. However, if cleaning and backwashing do not solve the problem, call in a professional.

3. Cracks

Cracks in the pool filter housing could be another potential cause of water leakage. These cracks may be caused by low-quality filter housings, chemical damage, or wear and tear over time.

Solution: Begin by checking the filter housing for any visible cracks. If you find any, mark them, and then drain the pool system, making sure the power supply is turned off. The pool filter housing should then be cleaned with a soft sponge or cloth. Once it has been thoroughly cleaned, use a sealant designed for these types of materials to fill the cracks.

4. Loose Components

Loose components within a pool filter can cause water leaks to occur. Tubing, clamps and bolts may become loose as a result of vibrations caused by the pool pump, chemical exposure or general wear and tear over time.

Solution: Check the entire filter unit, including the hoses, clamps, and other components. Tighten any loose fittings or replace the damaged ones.

5. Installation Errors

The pool filter may leak water when it is not installed correctly or is not aligned with the flow of water. A filter that is not aligned correctly may cause water to leak from the wrong spot or damage the filtration system entirely.

Solution: Ensure the filter has been installed precisely as per the manufacturer's manual. The user manual will guide you on how to install and align the filter properly. Besides, the pipes that connect the filter to the pool's plumbing should be checked for any misconnections.


In conclusion, several reasons could be causing your pool filter to leak water. The key to fixing the leakage is identifying the root cause of the problem. Once identified, appropriate measures should be taken within time to avoid more severe and complicated problems. Regular maintenance, inspection, and cleaning is vital when it comes to keeping your pool filtration system in proper working condition.


Just tell us your requirements, we can do more than you can imagine.
Send your inquiry

Send your inquiry

Choose a different language
Current language:English