Michael Frankel, CIPE, CPD, is president of Utility Systems Consultants. He has more than 35 years of experience in the plumbing industry and engineering and design profession, and is the author several books. R. Dodge Woodson (Brunswick, ME) has over 20 years' experience as a home builder, contractor, master plumber, and real estate broker. He is the author of many McGraw-Hill books, including Be A Successful Building Contractor 2/e, and National Plumbing Codes Handbook 2/e.