u/Front-24two

I have a 2" drain line that I want to use for a new shower, sink and macerating toilet. Code is not and issue and it would get infrequent use so not worried about overuse/clogging.

My question is how would I tie in the shower drain and the macerating toilet to this existing outlet line. Should the toilet line connection be lower than the shower drain connection? Would a check valve on the shower line be essential or beneficial.

I really don't want to cut concrete and redo anything underground.