Arguably the most widely used variety of PEX tubing on the market, Non-Barrier PEX Pipe can be used for different reasons. The main use is in hot and cold plumbing systems. It can also be employed in potable water applications. Nations WareHouse offers every size of Non-Barrier PEX tubing for an optimal residential plumbing system. Non-Barrier PEX is lead free and compliant with following standards: NSF/ANSI 61 Annex G (nsf-61-g), NSF/ANSI 372, ASTM F876/F877/F2023.