I wouldn't be afraid to do the work now. The concrete will set up fine under water. Once you insert the smaller pipe into the larger simply tamp some old rags, hay or whatever back as far in & between the pipes as is possible. The smaller pipe will then take the water flow & you can tamp the cement in around it.

Pond Boss Subscriber & Books Owner


If you can read this ... thank a teacher. Since it's in english ... thank our military!
Ric