I have a project that requires installing a Mule tape for AT&T to pull their fiber.

It is 3" rigid conduit and about 300' with no pull boxes running along the ceiling of a 24' high warehouse with lots of equipment in the way. There is already an existing 50pr in it. Laying in a new conduit would be very difficult due to the location.

I don't think it is airtight enough to use a vaccuum. My fishes are only 200' and 165'. I was thinking about pushing 1 in from each end and somehow entering the conduit to add a poly string to each to make the long pull. The conduit is hung on unistrut so I don't think I can pull apart enough slack to get one of the connectors off. That leaves a pipe cutter or cutting a hole to get in. neither of these sounds like a good idea.

I'm hoping somebody here has better solution.

THANK YOU