PEX A Pipe White. For use with Expansion PEX A fittings and sleeves (ASTM F1960) and the only PEX A pipe approved for use with PEX B insert fittings, crimp rings and stainless steel cinch clamps (ASTM F1807) in Potable Water installations. Compatible with Uponor (Wirsbo) ProPEX piping systems (ProPEX is a trademark of Uponor). Pipe is opaque in color with Black print. Can be used for any potable water supply. 100 psi @ 180 F. ASTM F1960, ASTM F1807, F876, F877, F2023, F2080, F2159, ASSE 1061, CSA B137.5.