atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services Outside Plant OSP Construction Sealing PVC couduit

Hello I need some advise,

I have 1 1/4 PVC running from a customers basement to the pole. It 90's up the pole about 2'. Verizon has pulled their fiber through it and now I have to seal the end. The sparky who installed it says just use spray foam, but I don't like that solution. What would you guys use?

Thanks,
Alec

I stuff a rag down the pipe around the cable about 3" down, then fill the void with fire caulk for all but the last half-inch. I then use standard duct seal to finish it off with a bit of a cone to shed water away.

Same basic process here. I usually look for some thrown out insulation (or a shop rag) to wad-up and stuff in a few inches, then fire-caulk the rest as Ed said.

Spray foam is a pain to deal with after the fact, when adding anything else. With the rag/caulk method, you can usually re-use if installed correctly.

Thanks Ed,

I had fire caulk in mind, but the duct seal on top is a good idea. Now the only problem is finding my stick of duct seal in the truck!

Thanks,
Alec

No problem. I like to use fire caulk because it is liquid enough to seal well, but pliable enough to remove. I also use the duct seal to provide sunlight resistance, since fire caulk will crack when exposed to direct sunlight.

Finding it in your truck should be easy. Just look for the black thing that has screws, bridge clips and hair stuck all over it.

I like service entrance fittings you can put on the top of the conduit. Easy to remove and prevents water from running into the conduit. Of course this introduces a bend in the cable which may not be acceptable for your situation. Whatever you use to fill the void, make sure it comes out somewhat easily in case you/someone else needs to run future wire.