The most frequent source of sewer drain blockages is the simple buildup of dirt, debris and mineral deposits. If you are a restaurant worker or employed in a food processing facility, you have seen firsthand how quickly grease and other organic matter can accumulate in pipes and drain lines. So what should you do when these blockages occur? Call Roto-Rooter. Since 1935, we have been cleaning sewers and drains, and no job is too big or too small. Trust us―we’ve seen it all!