Many homeowners have had to deal with a malfunctioning sewer line at one time or another—often, at the expense of limited know-how. It pays to be prepared if the sewer line breaks down, says Michael Petri, owner of New York-based Petri Plumbing and Heating, Inc. According to Petri, a sewer line ... » Learn More about Homeowner Handbook: What to Do If the Sewer System Breaks Down