A high-tonnage pipe-bursting system designed for use in water- and sewer-pipe replacement, the HammerHead HydroBurst HB125 features rod string with a rotation ability that allows it to "drill" through pipe collapses when setting up a burst. Hydraulic leveling jacks keep the unit on center with the host pipe and can be activated at any time during the burst without having to stop and re-shore the unit.