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What is a backwash valve on a swimming pool filter? - FAQs

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What is a backwash valve on a swimming pool filter?

A backwash valve is a feature that allows the flow of water to be reversed through a sand filter or diatomaceous earth (D.E.) filter in order to refresh the filter by knocking loose accumulated dirt and debris and leave the sand or (D.E.) clean and ready for further use.








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