how to change the sand in a swimming pool filter


Author: Poolking - Swimming Pool Equipment Manufacturer

Swimming pools require extensive care and maintenance to keep them healthy and safe for use. One of the essential aspects of pool maintenance involves cleaning and changing the filter sand regularly. Over time, the filter sand can become clogged with debris, minerals, and oils, leading to restricted water flow and dirty water. Fortunately, changing the sand in a swimming pool filter is a simple process that any pool owner can perform without requiring professional assistance. In this article, we will take a closer look at how to change the sand in a swimming pool filter.

Understanding How Filters Work

A swimming pool filter works by removing contaminants and debris from the water as it passes through the filtering media. There are several different types of pool filters, including sand filters, cartridge filters, and diatomaceous earth (DE) filters. Sand filters are the most common type of filter used in residential swimming pools. The sand used in the filter acts as the filtering media, trapping and removing contaminants from the pool water.

Why Change the Filter Sand?

Over time, the sand in the pool filter becomes dirty and clogged, resulting in decreased water flow and dirty water. In addition, the sand can develop channeling, which causes some areas of the sand bed to be unused, leading to poor filtration. Regularly cleaning and changing the filter sand will ensure that the pool water stays clear, healthy, and safe.

Steps to Changing the Sand

The process of changing the sand in a swimming pool filter involves several steps that need to be adhered to. Here's what you need to do:

Step 1: Turn off the filter pump and water supply

Before you start the sand changing process, ensure that you turn off the filter pump and the water supply. This will prevent any water from flowing into the filter during the sand changing process.

Step 2: Drain the filter and remove the sand

The first step to change the sand in a swimming pool filter requires removing the old sand from the filter. To remove the sand, unscrew the filter head and carefully drain the filter. Remove the old sand from the filter and dispose of it properly.

Step 3: Clean the filter tank

After removing the old sand from the filter, clean the filter tank thoroughly using a garden hose. This will ensure that any leftover debris, dirt, and sand are removed from the tank.

Step 4: Add new filter sand

Once the filter tank is clean, it's time to add new filter sand. Choose high-quality filter sand that is suitable for your filter system. Add the sand slowly until the filter tank is about two-thirds full. Use a soft cloth or cardboard to level the sand.

Step 5: Assemble the filter head and restart the filter

After filling the filter tank with new sand, reassemble the filter head, ensuring that it is tightened securely. Turn on the water supply and the filter pump, and start filtering the pool water.

Maintaining Your Filter

Changing the sand in a swimming pool filter should be done every three to five years. However, maintaining your filter is essential to keep it in good working condition. Here are some tips to help you maintain your pool filter:

- Backwash the filter regularly to remove any built-up debris and dirt.

- Check the pump and filter for any leaks or cracks.

- Ensure that the water chemistry is balanced, as imbalanced water chemistry can cause filter problems.

- Monitor the pressure gauge and clean the filter if the pressure rises above the recommended level.


Cleaning and changing the sand in a swimming pool filter may seem intimidating, but it's a necessary maintenance task that every pool owner should know how to do. By following the steps outlined above and correctly maintaining your filter, you will ensure that your pool water stays healthy, clear, and safe for swimming.


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