how to clean large pool filter


Author: PoolKing - Pool Sand Filter Manufacturers


Either for recreational or competitive purposes, swimming pools are an excellent addition to any home or facility. But as much as pools can be fun, they also require maintenance for a good swim experience always. A pool's water needs to be clean from dirt, leaves, and other undesirable elements to keep your swimming pool safe. A large pool filter can help achieve this. However, after a while, it can become dirty, and this is where cleaning comes in.

In this article, we will provide detailed instructions on how to clean a large pool filter to keep the pool free from unwanted impurities. So, let's dive in!

What is a Large Pool Filter?

A large pool filter serves as part of a pool's circulation system. It works to clean and maintain the pool water. Typically, the filter removes all unwanted particles and biodegradable substances, including dirt, leaves, and more from the pool.

Why is Necessary to Clean a Large Pool Filter?

Cleaning a large pool filter is essential in ensuring that the pool water stays clean and free from pollutants. Over a while, a filter will gather dirt, leaves, and other debris from the pool. These particles, if left unattended, can cause damage to the pool's circulation system, leading to costly repairs.

Cleaning a large pool filter regularly will prolong its lifespan, saving you money in the long run. Also, a properly cleaned pool filter will provide your pool with crystal clear water, making your swimming experience more enjoyable.

Below are the steps to clean a large pool filter:

Step 1: Turn off the pool pump

Before cleaning the pool filter, turn off the pool pump to prevent the water from circulating while cleaning. If the filter is still being pumped with water, dust and debris from the clogged filter may get into the pool.

Step 2: Remove and clean the filter's cage

The filter's cage is the first thing to clean. Remove the filter's lid and take out the filter itself. Clean any dirt or debris in the cage using a stiff brush or hose. Be very gentle as the plastic may crack or break.

Step 3: Clean the filter

The next step is to clean the filter. Rinse the filter with water from a hose to remove any large debris. Afterward, remove all the small particles that may have formed through the filter system. Use a filter cleaning solution, and a hose to spray rinse alternatively. This solution is specially designed to remove the debris and particles collected in the filter system.

Step 4: Soak the filter

Soaking the filter is necessary to clean the remaining accumulated particles before returning it to the filter system. Follow the instructions on the filter cleaning solution and soak the filter as long as the solution recommends. Typically, filters should be soaked for 12 – 24 hours.

Step 5: Clean the filter's O-ring

The filter's O-ring is the rubber material which helps to seal the filter system. Clean the O-ring with a soft towel and a small amount of grease. This cleaning helps to prevent any leaks in the filter system in the future.

Step 6: Re-assemble the filter

After cleaning the filter and its components, it's now time to put it back together. Start with the O-ring to ensure a tight seal. Next, return the filter inside the cage and put the lid back on. After that, turn the pool pump back on to ensure everything works as it should.


Cleaning your large pool filter regularly is essential to keep your pool free from bacteria, debris, and other unwanted impurities. It's an easy task that you can do yourself, and it doesn't take much time. With proper cleaning and maintenance, you can prolong the lifespan of your pool filter, providing you with sparkling clean water and an enjoyable swimming experience.


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