I have the full well and pressure tank system finally working :)
Need a run from the wiring closet / plumbing closet with pressure tank to other side of the cabin where the toilet flange is. Not more than 25 feet. It's a EDPM roof, on top of junk plywood in this section. 6 inch rafters. No insulation yet.
The only plumbing in the crawl space is the toilet drain and main drain for the house - which is capped for now. Also the black poly for the well, which has heat tape on it. I want to avoid any water piping in the crawl space as it freezes.
Question - run the PEX in the rafters or find way to keep it actually inside under the ceiling tiles (when they get installed). I am hoping to keep the cabin heated this winter.