Interlocking planks used to form a liner inside a damaged pipe or conduit.

The concept

The repair method positions planks in the invert of a host pipe, supports them with rebar, and fills the space behind the liner with cementitious grout.

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Interlocking planks form a liner in the invert of a damaged host pipe. Reinforcement supports the assembly and cementitious grout fills the space between the liner and existing pipe.