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There could be many reasons why sand or other debris may be passing through your filter and back into the pool. One reason may be you have a cracked lateral or stem pipe in your filter system. Another reason could be that your sand is past due for changing. Your gasket on the multi port valve may be stretched and need to be changed. If you are seeing sand or debris go back into the pool, contact us and we will gladly help you solve the problem.
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