Xpost- water running in thru poured walls where pvc pipe enters

GilligansIslandMarch 21, 2011

Our house is nearly done, however we had heavy rains last night and now there is water coming in thru the mains water and sump pump piping going out the poured concrete basement walls. We had the lot graded in the fall, but it's obvious the water is running towards the foundation.

Since both the lines running in/out of walls are leaking, is it possible this wasn't sealed properly? Builder is coming out today to have a look, but I just want to be prepared for the solution. I've read various solutions already, some 70% say fix from inside, others strongly suggest to fix from outside. I'd hate to agree to just filling the holes from the inside if it's just a temporary fix.

It doesn't appear the holes were filled from the inside to begin with. There is a gap between the PVC piping and concrete holes that were drilled in the walls. The water is running (continually flowing) clear with no soil or sand in mix. You can put your fingers in the wall, but not far enough to see if the outside is even sealed. Thank you!

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worthy

clear with no soil or sand in mix.

Sounds like a leak in the supply pipe.

    Bookmark   March 21, 2011 at 7:40PM
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lazypup

per code a pipe is not permitted to touch any concrete in the wall. When running a pipe through a masonry wall we are required to sleeve the pipe.

Properly to sleeve the pipe they are required to install a short length of pipe at least two nominal pipe sizes larger than the desired pipe and extending out about 2 to 3" on either side of the wall. The sleeve is then sealed to the concrete wall in any desired manner including casting it into the wall as the pour the concrete if so desired. In some jurisdictions they will allow the foundation contractor to simple place a cylindrical form and pour the wall with the desired hole through it, or they may drill the desired hole through the finished wall when the concrete is set.

Later when the plumbers set their pipes through the sleeves they are supposed to fill the space between the exterior of the desired pipe and the interior wall of sleeve with expanding foam.

From your description it sounds as if they didn't inject the foam in the hole. The simple solution would be to use a water hose to wash as much of the dirt, sand and silt out as you can then fill the hole with expanding foam. When it hardens the hole will be sealed.

    Bookmark   March 25, 2011 at 9:00PM
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GilligansIsland

HI thanks for responses.

The plumber (nor builder as builder was last to dry-lock and frame basement) did not close off the hole drilled from the interior basement wall. The builder said the company that backfilled, did seal from the outside. Still not too sure about that since two different holes leaked and they are on different sides of basement. The plumber came in and sealed with hydro cement. I hope it holds!!

    Bookmark   March 28, 2011 at 4:48PM
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