Image All copper replaced with PEX May 10, 2014thinktankair The copper water lines were blow out by freezing water. I replaced all the lines with PEX. It expands and this is what they use in new trailers. The bottom picture has the new linolium I installed under all the PEX. Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading...