Welcome to Plbg.com
Thank you to all the plumbing professionals who offer their advice and expertise

Over 600,000 posts related to plumbing

Welcome to Plbg.com (aka: PlumbingForum.com) we are the most popular plumbing information sharing, advice, DIY and educational forum on the Web. Ask any toilet, sink, faucet, pump, water quality, and plumbing related questions. Please refrain from asking where to purchase a product, business, pricing, or legal questions, for contractor referrals, or any questions not related to plumbing. Keep all posts positive and no advertising. This site is free and made possible by:  

Post New
Search
Log In
How to Show Images
Newest Subjects
 PVC electrical conduits
Author: sum (FL)

I have a question about those SCH80 gray color electrical conduits that are used a lot down here in south Florida for outdoor wiring and indoor below grade wiring.

There has been dozens of times to pull new THHN conductors through them which sometimes require me to pull a fish tape in then repull all of them back. Each and every time I pulled out old conductors they are wet. This means water got inside these conduits.

I know it rains a lot down here and water table is high and the conduits may be submerged.
I don't expect a PVC water line to leak. But for PVC conduits even the pros told me its not uncommon for them to be wet inside. Why? PVC is PVC and its solvent welded why would it leak that much more frequently?

Post Reply

 Re: PVC electrical conduits
Author: packy (MA)

they were not installed properly.
we have to pressure test our piping and electricians should be required as well.
(underground is what i mean)..

Post Reply

 Re: PVC electrical conduits
Author: stuckinlodi (MO)

Even if things are sealed up fairly tight there is always some path for air to leak inside the conduit and that air contains moisture, so you can get condensation inside the conduit when there are temperature changes. Over time that condensation accumulates since it doesn't have a place to drain off and it doesn't evaporate due to being confined. Sort of like getting condensation in a gas tank on a car. I suppose if the water accumulation was too large or a concern you could add a drip leg off a tee in the above-ground conduit at a low point. Or drill a couple of small holes in the pvc on the bottom side so water would drip out.



Edited 4 times.

Post Reply

 Re: PVC electrical conduits
Author: PlumberLoren (CA)

Be careful drilling holes in the bottom, you could damage the wiring and it will allow a path for water to enter the conduit. You may want to reconsider drilling holes.

Post Reply





Please note:
  • Inappropriate messages or blatant advertising will be deleted. We cannot be held responsible for bad or inadequate advice.
  • Plbg.com has no control over external content that may be linked to from messages posted here. Please follow external links with caution.
  • Plbg.com is strictly for the exchange of plumbing related advice and NOT to ask about pricing/costs, nor where to find a product (try Google), nor how to operate or promote a business, nor for ethics (law) and the like questions.
  • Plbg.com is also not a place to ask radiant heating (try HeatingHelp.com), electrical or even general construction type questions. We are exclusively for plumbing questions.

Search for plumbing parts on our sponsor's site:




Special thanks to our sponsor:
PlumbingSupply.com


Copyright© 2017 Plbg.com. All Rights Reserved.