Every time I do laundry water backs up into the kitchen sink. Our toilets and bathroom sink are also often clogged. We had our drains snaked by plumbers twice but the problem always comes back. There is a large maple in the backyard but the snaking didn't produce an uncommon amount of roots I thought. Is this a root issue, break in the plumbing, clogging issue in pipes or is there something physically wrong with the set up of the plumbing?