Female Connector – Pipe Butt Weld Female Connector – Pipe Butt Weld Part NoPx Pipe Size (NPS with Sch80 WT)P Pipe Size, NPTLBFWork. Press, (psi)FAV-4PSW-8N-SS1/41/238.914.227.04900FAV-6PSW-8N-SS3/81/238.914.227.04900FAV-8PSW-4N-SS1/2 1/437.319.122.27500FAV-8PSW-8N-SS1/21/243.719.127.04900