... 3) CSA&UL Certification Copper pex sweat adapter pipe fitting TX04421 Series1) Insert for fittings conform to F1807,2 ... Male Thread, NPSM Female Thread,4) Copper pipe fitting Thread conform to ANSI/ASME B1.20.1,5) ... CSA(C37700\C46400\C69300\C48600 Forged Brass),6) Copper pipe fitting Conform to NSF61-4(ASTM F1807, CSA B137.5). ... high quality. copper pex sweat adapter pipe fitting TX04421 Series with CSA