If your in a high rise and are using a portable without auto fill, get the "easy fill' hose like the one Mytee sells and connect one end to the water supply and the other drop into the fresh water tank. When your ready to clean, turn on the water at a rate that when you clean, it is slowly filling up your tank at the same time. If you need to stop you can just turn the water off, otherwise by the time I am done dumping the bucket, the machine is right where I need it to be to keep on with my cleaning. Plus if you have no heat exchangers on your machine it keeps the water hot. No waiting around to refill. Lol! Takes a couple times to figure out the water flow setting you need it at but once your confident its almost like having auto fill. lol