It's a sand filter thing. A excessive pump blows dirt THROUGH a sand filter, but blows OUT cartridges and DE membranes. In either case, not only vacuum debris would come through, DE would come through as well.
Re: Particles coming out of the return valve
It's a sand filter thing. A excessive pump blows dirt THROUGH a sand filter, but blows OUT cartridges and DE membranes. In either case, not only vacuum debris would come through, DE would come through as well.
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