I am replacing some failed galvanized water pipe indoors. Two of the existing galvanized pipes poke straight through the exterior wall of the house, right above the foundation, and have hose bibs attached to the end. I am replacing the indoor pipe with PEX, but I'm stumped when it comes to how to get the PEX to connect to exterior plumbing. PEX, from what I've read, will degrade rapidly in the presence of UV light.
My goal is to attach a hose bib fitting to the straight across port of a tee at exterior, and connect some 3/4" LDPE poly pipe to the perpendicular port of the tee. The LDPE poly pipe will go out to a couple posts in the yard and have hose bib fittings on them.
I was planning on using PVC for the exterior plumbing, but I understand that plain white PVC cannot be used indoors for any supply plumbing, only DWV. Am I allowed some leeway to have a short (6-12") stub of PVC sticking through the exterior wall so the PEX can be connected to it?
I have a second question which is... as I have only a hole drilled through the siding of the house, how do I securely fasten the pipe coming through so that movement outside won't transfer inside?