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How to Build a Homemade Above Ground Pool Sand Filter | Hunker
Of all the components to an above-ground pool's mechanics, the one that anyone can build is a filter. Anyone with basic plumbing skills and access to pool sand can accomplish this in a matter of hours. A pool's sand filter works by trapping contaminants and particles between the grains of sand as the water enters the filter, then preventing their release into the swimming pool.