Need to know how much water to put in

Hello. You can empty it by taking it to a sink, first unplug it, and tip it toward the end it brews from until the water stops coming out, not too much at once, as the pipe is only so big, so go easy or you'll have a mess. Then after doing whatever it is, before plugging in, just pour water into it until it come out of the brew head, then you know it is full again, and can now plug it back in. If you need more information, as there are several Bunnomatic models, and you did not include yours, you can go to www.bunnomatic.com, and get a owners, or parts manual.

Hope that helped, and thank you.