Running water in the darkroom is a luxury, not a necessity. I dont use a slop bucket in my DR, no need, I dont waste that much chemy to warrant one. Keeping clear water on hand is easily handled with a couple of jugs of deionised, and some distilled, for mixing chems. My discards mostly pour down the toilet, those that cant, stored in a marked jug for later proper disposal. I develope film at the kitchen sink, and use the DR for printing and loading film into the can (or LF holders). My fresh prints go in a holding tray until ready to wash, then to the kitchen for that.