Compression fittings: This kind of fitting includes slipping a threaded brass nut more than the tip in the PEX tube, followed by a tapered plastic compression ring (view on SupplyHouse). A hollow brass tube is then inserted into the conclusion from the PEX tube. CHARLIE: You talk about these pipes https://kameronxelrx.blogoscience.com/39543767/a-review-of-repipe-plumbers