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The contractor connected the metal cone to the pneumatic device and bolted the assembly to the leading end of the HDPE pipe.
A cable pulled the cone and new pipe into the old pipe. The cone was larger than the inside of the old pipe, so it broke the old pipe as the pneumatic device hammered forward.
At the other end of the line, a winch pulled the cable attached to the cone.
This pit exposed the old pipe near its middle. As the cone approached on the right, the clay pipe began to split.
At this point, the cone had passed nearly all the way through the pit, leaving the old clay pipe shattered. The project took 2½ days to complete, replaced 100 linear feet of pipe, and cost approximately $8,600. In this case, homeowners’ insurance covered the cost. The contractor was A&L Underground, in San Antonio, Texas, (210) 492-5545.
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