At least you found it now. My boss drilled all the way through and ran cat through a central vac line one time. The house was being insulated with spray foam and the customer wanted to add one more data jack for the office. We ran in, worked around the insulators to get it done. He drilled the floor and pipe, then stuck a glow rod down and pushed through the foam. the guy down below attached the cat and had no idea there was a pipe in the foam. No one found it until the house was finished and the central vac wouldn't get suction.