Place copper connection underground or in shower curb?
I'm changing my tub into a shower with the entrance to the shower where the tub controls used to be. That wall had a bunch of "stub-ups" (??) that need to be moved. I can either make new connections underground or lower all that stuff so that they hug the concrete subfloor an can be hudden in the shower curb. Which would be best? Is placing pipes in the curb legal? I'd rather not have the connections underground of it could be helped.
Thanks for all help and criticism.