There are many different kinds of bathroom plumbing diagrams on the internet. Although bathrooms vary in size and have differences in shapes and contents, the plumbing fixtures tend to have basically the same functions and formats.The "rough-in" plumbing involves piping inside the walls: the water and sewer lines to the bathroom and the vents out of the bathroom. Rough-in plumbing usually
. involves the "drain-waste-vent" system, in which air enters through vents to make the water drain more easily. "Finish" plumbing is what's done when the fixtures are installed after the walls are closed. Finish plumbing is easier to alter after the fact in order to install new fixtures, whereas rough-in plumbing is difficult to alter, and small problems with the design of rough-in plumbing can result in large problems involving incorrect air pressure, problems with the traps or other major plumbing issues. For this reason, it's important to carefully consider the diagrams of rough-in plumbing.Tim Carter, the newspaper columnist who writes the "Ask the Builder" column, ran a long article on rough-in plumbing diagrams (http://www.askthebuilder.com/722_Rough-In_Plumbing_Diagram.shtml), including information on how to produce them, why they're necessary and some of the rules of thumb. Carter's Plumbing Design page (http://www.askthebuilder.com/PlumbingDesign.shtml) also includes some information on plumbing diagrams.The Frugal Non-Consumer site has an excellent page on Understanding a Bathroom Plumbing Diagram (http://www.the-frugal-non-consumer.com/bathroom_plumbing_diagram.html) "" it breaks down the terminology, the usual symbols used in the diagram and the various pipe fittings that they represent. Renovation Headquarters has a computer diagram, rather than a hand-drawn one, showing how bathroom plumbing relates to the rest of the house (http://www.renovation-headquarters.com/bathroom-plumbing.htm). The DIY Network maintains a page describing and diagramming the hot and cold water pipes throughout a house, including the pipes and vents in and around the bathroom (http://www.diynetwork.com/plumbing/all-about-plumbing/index.html). Their plumbing section contains useful information on a variety of home plumbing topics. More reference links: http://www.askthebuilder.com/722_Rough-In_Plumbing_Diagram.shtml http://www.the-frugal-non-consumer.com/bathroom_plumbing_diagram.html
