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View Full Version : leak from rain where water supply enters foundation



fjbuono
10-08-2005, 07:13 AM
For some reason, my basement foundation has a large opening
with a 2" pvc (conduit) running through it - about 9" long.
In the pvc pipe is my copper water supply line - from the street.

The leak - on heavy rains - is producing water inside the pvc
pipe where it drips out on to the basement wall. The copper
water line is at such an angle in the conduit that I can't see or reach the
dirt (?) on the outside of the foundation to visibly see the leak.

I guess I have no choice but to seal up pvc conduit to stop the
leak?? If so, what product should I use to do this?

Thanks.

Frank

plumber1
10-08-2005, 07:27 AM
Seal it. It should have been seald to begin with.

Gary Swart
10-08-2005, 07:39 AM
Best thing I've found is hydralic cement. It seals even if water is coming through the hole. You may want to enlarge the hole a bit to be able to pack the cement in, but this will do the job. This product comes in quart sized cans. You mix just the amount you will be able to use immediately because it will set up quickly. Wear rubber gloves when you handle the stuff, it's very caustic.

fjbuono
10-08-2005, 07:39 AM
Seal it. It should have been seald to begin with.

What product do I use? I assume some kind
of expandable gel?

Thanks.

Frank

jimbo
10-08-2005, 07:56 AM
DO NOT use any cement product in contact with the copper.

Check with a local buliding material supplier for some kind of sealant. I would prefer to install this at the outside end, but I assume you are several feet below grade so this is not practical.

fjbuono
10-08-2005, 08:23 AM
DO NOT use any cement product in contact with the copper.

Check with a local buliding material supplier for some kind of sealant. I would prefer to install this at the outside end, but I assume you are several feet below grade so this is not practical.

Yeah, it's 7 feet down.

Since I have to fill the
inside of the pvc pipe conduit (which has the
copper pipe in it) I was hoping I could fill it with
some kind of expandable waterproof foam that
would adhere to the inside of the conduit and not
harm the copper pipe.

Frank

jadnashua
10-08-2005, 11:17 AM
I'm not sure about all, but many of the aerosol cans of foam use a weak acid to create the foaming action...check first, it may not be a great thing in contact with the copper, either.