Compression fittings: This type of fitting entails slipping a threaded brass nut above the end of your PEX tube, accompanied by a tapered plastic compression ring (look at on SupplyHouse). A hollow brass tube is then inserted to the finish from the PEX tube. PEX is less expensive than copper. https://riverahnua.mycoolwiki.com/7672230/replumb_house_things_to_know_before_you_buy