The room I have planned for my darkroom has at the moment electricity and heat. That's good. What's missing is water in and out.
Getting water in would not be a big problem. On the other side of a drywall I have both hot and cold water pipes. Couple of holes, some fittings ... no problem.
But drainage is a bigger problem. No obviuos way to hook up a drain.
So are there any standard solutions for this particular problem? A big tank under the sink? Something else?