Filtration
How does a pool sand filter work? Technology, multiport valve and filter media
A sand filter traps debris in a layer of quartz sand or glass media as water flows top-to-bottom through a pressure vessel. Learn how the multiport valve works, when to backwash, and which filter medium performs best.
Read moreHow does a swimming pool work? The complete system from A to Z
A pool works as a closed loop: skimmer and main drain draw water in, the pump pushes it through the filter, and return jets send it back clean. Here is how every component works together.
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