Leak Around Sewer Discharge Pipe

[dadbizdoc]

We had a very bad rain today and we found a very significant leak which we believe came from around the main PVC discharge pipe from our house. As you can see from the picture, when the house was built they put in two PVC pipes of different sizes. One for the main fresh water supply and one for the sewer discharge (the larger one). Then when it came time to finish out the house they fed the supply and drain through these existing pipes. It looks like water accumulated up against the foundation and then came in between the sewer pipe and the pipe placed as a placeholder. Is there any reason why I could NOT caulk around the existing supply and discharge to seal the space between the actual pipe and the pipe placed as a placeholder (I suspect there are proper names for this, I don't know). Thanks for any input you may have!

 

[breplum]

If you are not too far below grade then perhaps you might have "luck" with a good polyurethane caulk.
There is only one proper way to seal wall penetrations and it is with mechanical seals. Good plumbing practice dictates permanent water-tight rubber seals. Metraflex is one such mfr. but at this point you are left with spit and bubblegum for such poor work practices.

Also, you might try dealing with getting water away from your foundation in the first place, because the hydraulic force of water is hard to block.

 

[CT18]

Its going to be hard to get link seal in there now. The pipe is not sitting centered in the sleeve. Also tough to get at the nuts with that fitting so close. That is not the proper way of doing what they did, at all. That never should have passed inspection

 

[Jeff Handy]

You might be able to slightly lift or jack up the sewer pipe, to create a slight gap under it.

Then clean out all dust and crud with a blower, vacuum, rubbing alcohol, whatever.

Then goop in a heavy amount of pure silicone caulk under it and part way up the sides, then lower it back down.
Or use polyurethane, as suggested.

Then continue gooping up heavy and deep, until the gap is filled.

If the water outside gets high enough, that other penetration will also need sealing up.