I am in process of planning a new bathroom (sink, toilet, stand up
shower) in my unfinished basement (soon to be finished). The house is
relatively new and the basement was planned for a bathroom as there
are 2 drains located close together. One is flush with the floor with
a plug in it. I am pretty sure that is for the toilet and all I need
to do is put a inside fitting flange on it. The other is a 12x12
framed in hole in the cement floor with a horizontal pipe sticking
halfway into the framed box. I am assuming that is for the shower and
I have to fit my own p-trap for that. My question is where should
the sink drain too? Does the sink drain share the shower drain and is
my setup normal? I am thinking the shower pan is supposed to go right
over the 12x12 boxed drain after being filled with mortar...but don't
get how to do the sink drain. I figure there is a common answer since
there is even a vent pipe brought down to this area already.
thanks in advance for your help.