The preformed nylon pipe, S/V to “T” piece is a replacement part for the four liter and eight liter per hour bi-distilled Fi-Streem™ Water Purification Stills. The LabStrong™ Fi-Streem™ part number 857X28LS is the direct replacement of the Thermo Fisher Scientific™ Barnstead™ Fi-Streem™ part number 857X28.