Washing machine drain line back ups are very common. You just purchased a new front loading washing machine and now your drain line is backing up. What happens is the old top loading washing machine does not drain as fast as the new front loading machine. One of the reasons this could happen is the drain line could have an obstruction that you did not notice, because the flow of water was less. These drain lines could be cast iron, copper, lead or galvanized steel. These types of drain lines should be upgrade to the proper plumbing codes. We recommend you call us at United Sewer & Drain we can solve all your washing machine drain line problems.