Compression fittings: This type of fitting involves slipping a threaded brass nut over the top with the PEX tube, accompanied by a tapered plastic compression ring (check out on SupplyHouse). A hollow brass tube is then inserted to the finish of the PEX tube. Numerous kinds of fittings, usually brass, https://whole-house-repipe76642.wikibyby.com/1288033/detailed_notes_on_replumb_house