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  1. M

    DE Filter questions: "blowthrough" and normal pressure?

    Hi, Unfortunately I can't get the search feature to work - not sure if I'm inept or if it's broke... I've got an inground pool with a Hayward DE filter that I had a couple of questions about. Filter is 36 square feet, three 1-1/2" return lines (one about 20 feet, one about 30, one about 45...