Question for all Oceanic aquarium owners

[Scuba_Steve]

Im bought a complete aquarium a few days ago off a local classified but the owner is out of town for a few days and I need to get plumbing ready for it when they get back and I can pick it up. It is an oceanic 105g tank. I just need to know how the overflow is setup. What size drain and return. Are they normally threaded? How many drains/returns? If only one each do most use drain and return as drain to increase flow?
Thanx,
Steve

 

[barjam]

I have an oceanic but it wasn't RR. If you can use both as a return I would as it is the most flexible option.

My tank has two holes drilled and at first I had one as return,now I have both as drain. Also if I had it to do over again I would have it drilled for closed loop, just in case. Powerheads suck.