Q. My city allows homeowners to install their own plumbing. But to get the permit, I need to supply them with a rough-in plumbing diagram. What is a plumbing diagram? Can I just do a bathroom plumbing ...

The plumping system in your home needs a few things to work properly, namely water and air. While the first one is obviously, the second one might not be. In order for water to flow down a drain, the ...