I have become tired of my tiny bathroom darkroom. Now I have 14 feet of sinks and the floor drain I was going to use is no good and not fixable. Any ideas how to handle large sinks in a condo. It's first floor, cement slab floor with only a bathroom and kitchen. I have been thinking holding tanks, pumps or draining through the wall into the bathtub. I am sure I am not the first with this problem. The neighbors and association are not a problem as the building is artist owned legal work/live space. 10 years ago the plumber 'forgot' to install my utility sink! I let it pass and now I am lost without it.