Does concrete adhere to PVC? What is the best way to run a 4 inch piece
of
PVC through the wall of a concrete pond and keep it from leaking at the
joint? The PVC pipe will be about two feet below the water surface.


I'd suggest copying the practices the swimming pool builder use. I
assume by 4 inch you mean diameter, not length.

If you have not poured the concrete yet, I'd simply pour the concrete
around the pipe, making sure the concrete is packed around the pipe so
there are no voids, especially underneath the pipe.


The pond is not built yet. Is that what the swimming pool builders do?
Just pour concrete around it? I could make the wall thicker near the
joint...perhaps 12 or eighteen inches. Also thought about running a bead
of silicon around the pipe before pouring the concrete.

Thanks for the thoughts