spice into underground plastic
I have a line that is used for surface water drainage that I want to tap into to add a catch basin. It is a 4" line. I will probably not put the catch basin into that line directly, but install a Y and put the catch basin at the end of 4-5 feet of added pipe.
The question is, how does one typically do this kind of splice? If I cut to the actual length of the Y to fit it in, I get no lap at the joints. Do I cut the existing pipe so that the Y fits partially lapping and fit it on that way or is there another way to make it work?