PEX Tubing is new building supplies. PEX pipe supplies is less expensive and more reliable than copper pipe and PVC. Learn more about PEX-AL-PEX tubing here. PEX Tubign alsoi have other names like PEX Tube, PEX Pipe, Radiators, Manifolds, Heat Transfer Plates, PEX-A PEX-C Hydronic Heating. PEX Tubing & PEX Tubing Supplies - Buy from the Online PEX Champion.