How to tie in old clay drain pipe into new sump pit

[Sokolq55]

Replacing small old clay sump pit with a new, larger one. Perimeter drain channels connect to existing pit via clay pipe under the slab. Once I break up the old pit to enlarge the hole, how do I tie in the existing clay pipe to the new pit?

I also worry that, when breaking things up, I may not be able to very cleanly sever the old clay pipe and end up with a jagged mess for the end of those drain pipes. Is there some sort of a longer-ish rubber insert type of a connection that would insert into the clay and expand or is a large fernco on the outside of the clay my only option?

Thanks in advance

 

[John Gayewski]

Fernco is your only option underground. There are some expensive underground no hub bands but why?

You need an angle grinder and a thin masonry wheel to get a clean cut. You could adapt to PVC if you end up breaking some clay.

 

[Sponsor]

 

[Terry]

Diablo makes some nice sawzall blades that cut clay lines cleanly and easily.
For clay lines that I've coupled to, I went to an outfit that supplies underground utilities. That had the perfect match on hand. The couplings fit perfectly.