I use the utility sink in my darkroom. I have a peace of 3" pipe with a rubber coupler from lowes and two apropreatly sized holes drilled near the bottom. I insert the pipe(Rubber side down) into the drain, fill the sink to the needed level and slow the water out of the tap down to match the speed of the draining. This works realy well and the only downside is I can't clean my trays and equipment until all the prints have finished washing.