My biggest concern torching in fittings near these "plastic" regulators/filters. I was thinking I could sweat the near fitting then attach it to the filter/regulator then sweat in the opposite side.
maybe I could get brass fittings for a thread to thread connection???
Either way I'm not sure of how to get these threaded in on a hard line installation.
Any experienced replies in this would greatly help as my only exp in this is an occasional hose bib or water pipe fix.