A 24 inch PVC air return ducting system was installed in a trench below grade the entire length of the cave.
Harrington's Brad Erickson demonstrates the "come-a-long" that will be used during the installation.
Tom Kendall briefs the installers on the proper techniques for solvent welding large diameter pipe.
Eagle's Ana Gieger, Brad Erickson, and the installers look on as primer is applied to the socket of the pipe.
The installers assemble the pipe and fittings while the solvent cement is still wet using the mechanical come-along.