What does the homeowner really need to know about plumbing systems?
Residential plumbing systems can be divided into two types: (a) water supply, and (b) waste drainage. Supply lines may be of copper, galvanized steel, or plastic, with copper being the most prevalent. The sanitary drainage system relies on gravity for its discharge; its pipes are much larger than the water supply lines, which are under pressure. Drainage lines may be of cast iron or plastic.
Dr. Ronn Phillips, Arch.D., and Bobbi Hauptmann, Environmental Design, College of Human Environmental Sciences, University of Missouri-Columbia
Last update: Monday, May 18, 2009