I want to re-plumb from the pump house to the cabin and all the fixtures inside. The plumbing goes from the pump, all above ground, through the crawl space, (about 6 ft) directly to the fixtures, kitchen and bath, which share the same wall, except for the stool. What I want to know is how to create a schematic for the new plumbing and what should I be aware of in doing so? This is in a remote area and I have not found anyone who wants to do this job. I want to remove all the copper lines and replace with PEX.