re: cannot get pull string through conduit

If you get a fish tape, bend a nice round head on the lead end.

It’s a 50/50 shot. What do the terminating ends of the flex look like? Are they straight connectors or are they 90s into the box?

Flex conduit isn’t air tight so the whole mouse method (plastic bag and vacuum) may not work too well in that situation.

We were able to run a mouse on a 200’ fun underground with condensation in it. 30’ isn’t anything for a mouse. So you’re either losing too much suction through the pipe or you’re SOL.