I have an exterior garage that I need an ethernet cable in for a desktop computer, but it's surrounded by a concrete slab and brick patio (seemingly making it impossible for me to run it underground).

However, someone roughed in two pex pipes from the garage to the basement though -- is it possible for me to use fish tape to pull an ethernet cable through that pex? I know I'd be sacrificing that pex pipe, but having the internet is more important right now

  • What about WIFI...there are range extenders. Dec 18, 2021 at 15:08
  • You'll want to use cable rated for outdoor underground conduit - not ordinary indoor cable, because that pipe will almost certainly be full of water. Fiber might be worth considering.
    – nobody
    Dec 18, 2021 at 16:30
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    Fiber could go in the AC mains conduit anyway. Anyway, two "pex" what's up with that? Potable water plus rainwater for toilet flushing? (mainly: rainwater is not hard water and doesn't leave calcium deposits). Very small sewer pipe? Hot/Cold seems like a lost cause, it would take forever and the water would be tepid due to the pipes and concrete sapping the warmth. Dec 18, 2021 at 18:11
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    I hope you are talking about pulling bulk cable, not cable with connectors on the ends. Once you get it through, connect to a proper jack - do not try to crimp on a connector. Dec 18, 2021 at 23:24

1 Answer 1


Assuming it's got no fittings with sharp corners, probably.

Use a vacuum cleaner to suck a string (or pulling tape) through, rather than fussing with a fish tape. Don't cut the tube and you might even be able to revert it to water use if you change your mind later.

  • 11
    a ball of fluff on the end of the string can help
    – Jasen
    Dec 18, 2021 at 8:43

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