The plumbing system in your home is designed to direct fresh water and wastewater to where you want them to go, without incident. You want wastewater to leave your home down a drain instead of overflowing into your home, and you want fresh water to come out of a spout rather than leaking somewhere within the walls. The plumbing trade has adopted a number of basic strategies and conventions to keep water controlled and go where we want it.It is a good idea to understand how your plum...