As part of our basement renovation we plan to add a jet tub to our basement bath. The shower rough in has a trap under the concrete. We did plan to elevate the floor under the shower and tub, can I run the tub drain to the shower drain (seperate p-traps)? If so do I need to remove the existing trap? am I better off to break the concrete at the shower drain and across to the new tub drain to tie in?