7 - Trades, Transport & Equipment Operators

When I start a new construction job on a house, especially with a custom built house, I have to figure out the piping, drainage and venting and make sure it's up to code. When I first walk in I look at the walls to try and figure out where to run the piping and how to conceal that.

It sometimes looks as though a plumber is not working but actually they are thinking hard about where to run the piping so it's not in the way of some ductwork. Plumbers have to have a three dimensional sense.