PEX potable water tubing combo - half (1/2) in. x 100 ft. red + half (1/2) in. x 100 ft. Blue PEX potable water tubing (non-barrier PEX tubing) is used for residential and light commercial hot and cold-water plumbing applications. Tubing is marked every 5 ft. with length, ASTM standards, approvals, certifications, pressure ratings and other technical information. PEX flow PXKT-RB10012 PEX tubing is a strong and flexible cross-linked polyethylene tubing with superior temperature and pressure ratings that is useful for plumbing project in commercial and residential hydronic radiant heating applications. PEX-B is made using a "silane" or "moisture cure" method of crosslinking, where links between the molecules of the HDPE polymer are formed after the extrusion process using a catalyst and by exposing PEX tubing to water (steam bath). PEX flow tubing conforms to NSF, UPC, ASTM and Warnock Hersey standards. Warranty: industry standard, 25-years manufacturer's warranty. Applications: 1/2 in. PEX tubing without Oxygen barrier is common for the following applications. Plumbing applications (hot and cold water). Loop radiant heating applications technical data: diameter: 1/2 in. L, 100 ft. (red) and 100 ft. (blue) PEX type: PEX-B pressure ratings: 80 psi and 200°F, 100 psi, 180°F, 160 psi, 73°F minimum bending radius: 5 (industry standard for 1/2 PEX) SDR-9 dimensional standards. Color: Red/ Blue. Material: Cross-Linked Polyethylene (PEX).