Discharge water from a washing machine often is laced with lint, hair, shredded facial tissues, and other soggy debris. There's no problem if the washer drains directly into a large-diameter sewer line. But if it drains into a utility sink, the debris could clog the small-diameter drainpipe. Trap the lint before it enters the drain by fastening a nylon stocking over the end of the washer discharge hose. Then empty the stocking every couple of weeks; replace it if it tears.