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I don't see where running your line under the ceiling insulation yes you should try to keep the fitting in the walls but also heat rises and if you insulate the lines i really don't see it freezes. Also if you feel its going the be real cold at times you can alway let the water run at trickle to stop from freezing.


PEX inherently leak at the two pinch points, because their is no contact in this area. Just put worm-hose-clamps on them. Use pipe compound too.


The problem is PEX clamps leak around the two crimp point areas. (Unlike hose clamps that have an overlap and have uniform area on the seal area) This leak can lead to pop offs and thus house interior flooding. Therefore homerun designs (no crimps behind walls and ceilings) allow for the leak and pop-offs to contain the water damage to a one area.


If those were crimped-on end-caps you'd have to cut them off - but they look like "sharkbite" fittings, which can be removed. If you lack the special tool, close an adjustable wrench down to the size of the pipe, and use it to push the tan collar into the fitting. Search for "sharkbite adjustable wrench trick" or "how to remove a sharkbite" if that's ...

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