10-30-2011, 07:38 PM
DWV ~ Drain, Waste, Vent. The basics of all outbound liquid / solid matter you expect your piping to "take care of".
The plumber gets "first crack" at a building shell because its imperative that drainage pipes be at the proper angle so that gravity can carry things away. Electricians, carpenters etc can work around properly pipes installed pipes. Toilets are basically drains designed to carry away wastes produced by the human body. Many parts of the world don't have (or even know what) our "modern" toilets are.
The plumber gets "first crack" at a building shell because its imperative that drainage pipes be at the proper angle so that gravity can carry things away. Electricians, carpenters etc can work around properly pipes installed pipes. Toilets are basically drains designed to carry away wastes produced by the human body. Many parts of the world don't have (or even know what) our "modern" toilets are.