You are here: Home>Special Groups>DST Full Bore Drain Valve DST Full Bore Drain Valve View more specifications DST Full Bore Drain Valve for you Show: 8 16 32 item per page View gallery View list View gallery View list goto DST Full Bore Drain Valve 3 7/8" x 15000 psi for Slim Hole Drain Valve - 3 7/8" The Drill Stem Testing full bore drain valve 3 7/8" x 15000 psi is applied for Slim Hole DST operation in well testing, conformed with NACE MR 0175 Show: 8 16 32 item per page View gallery View list View gallery View list