So I got this crazy notion of ripping out a small deck that was in the back yard when we moved in and replacing it with an outdoor kitchen. I am planning on running a cold water line to a sink. It will be buried underground under concrete. I have a line to tap off of about 10' away. What would be the best pipe to use and how do I find out how deep to go? I had a plumber out for the gas line I need to run and he quoted me pretty high for the gas, water, and drain to be run. I feel I can handle the electrical, water and drain to save some $$$.