Abstract: A system for dividing a conduit (12) into a plurality of compartments (20-24) includes an insert (10) which is formed by attaching a plurality of layers of a pliant material (14-17) near their lateral edges (18). The insert can be formed with a cable (25), a rope (26) or a tape (27) pre-positioned between the layers (14-17) or the cable (25), rope (26) or tape (27) can be positioned in the respective compartments (20-22) after the insert (10) is installed in the conduit (12).

Abstract: A new cable (16) may be introduced into a conduit (11) having an existing cable (13) therein by splicing the conduit (11) to form conduit ends (11A, 11B) with the existing cable (13) extending therebetween. The new cable (16) is positioned in a conduit section (58). A piston (67) may be attached to the leading end of the new cable (16) and is positioned in the conduit (11). A block (15) encloses the conduit ends (11A, 11B) and one end of the conduit section (58). The other end of the conduit section (58) is attached to a blower (70) which provides air under pressure through the conduit section (58), through the block (15) and against the piston (67) to position the new cable (16) in the conduit (11).