I have been slowly rebuilding the remnants of the darkroom in my basement. I just had a new door installed, upgraded the electrical wiring so I can put a heater in it. (it was fed from the dining room and living room-don't ask). The windows have a blackout cloth over it. There is a sink in it with drainage and water hoses for feeds. I am in the process of finding a plumber to do the water, but I need to know what I should try to get. I bought a regulator off the auction site, but I need to know how to incorporate this altogether. The term water board keeps coming up, can someone explain this to me?