how much sand goes in pool filter


Author: Poolking - Swimming Pool Equipment Manufacturer

How Much Sand Goes in Pool Filter?

If you are a pool owner or planning to be one, you must know the importance of keeping your pool clean and hygienic. The pool filter is one of the most essential components of your pool's filtration system that removes dirt, debris, and other contaminants from the water.

Pool filters need to be regularly maintained to ensure they continue to function correctly. One of the common questions that pool owners ask is how much sand goes in a pool filter. This article will delve into the details to help you understand everything you need to know about pool filter sand.

What is Pool Filter Sand?

Pool filter sand is a type of sand specifically designed for use in pool filters. It is a high-grade, silica-based sand that traps even the smallest particles in the water, ensuring that the pool water remains clean and clear.

Pool filter sand is typically available in different grades, depending on the size of the sand particles. The most common sizes are #20, #30, and #40. The larger the number, the smaller the particles of sand.

How Much Sand Goes in Pool Filter?

The amount of sand your pool filter requires depends on the size of your filter tank. Most residential pool filters require between 50 and 300 pounds of sand. The general rule of thumb is to use one pound of sand per square foot of filter area.

For example, if your filter tank has a diameter of 12 inches and a height of 24 inches, the total filter area will be 1.77 square feet. Therefore, you will need 1.77 pounds of sand to fill up the filter tank.

If you are unsure about the amount of sand your pool filter requires, consult your pool filter's manufacturer for recommendations.

How to Add Sand to Your Pool Filter?

Adding sand to your pool filter is a simple process if you follow the correct steps. Here is how it's done:

Step 1: Turn off the pump and drain the filter tank.

Step 2: Remove the filter head.

Step 3: Disconnect and remove the old sand from the filter tank.

Step 4: Ensure that the laterals at the bottom of the filter tank are undamaged and free of obstructions.

Step 5: Add the new sand to the filter tank, ensuring that it is evenly distributed.

Step 6: Re-connect the laterals and attach the filter head.

Step 7: Fill the filter tank with water and turn on the pump.

Step 8: Backwash the filter until the water runs clear.

How Often Should You Replace Pool Filter Sand?

The amount of time you need to replace the pool filter sand will depend on the usage of the pool and the quality of the water. It is recommended that you replace the pool filter sand at least once every five years.

However, if your pool gets a lot of use or is in an area that has a lot of contaminants, you may need to replace the sand more frequently. Regular backwashing and filter cleaning can also help extend the lifespan of your pool filter sand.


Pool filter sand is a vital component of your pool filtration system. It helps to remove dirt, debris, and other impurities from your pool water, ensuring that your pool remains clean and hygienic.

The amount of sand required for your pool filter will vary depending on the size of the filter tank. Follow the recommended guidelines for your specific filter to ensure optimal performance.

Replacing pool filter sand is a straightforward process, but it should be done at least once every five years to prevent any issues with your pool's water quality.

By following these simple steps, you can be sure that your pool will remain crystal clear and safe to swim in all year round!


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