The first few months the internal pump sucked up the water and forced it outside, and it quit working. So I manually drain that knob and about 2 cups of water will drain and when it stops, this *ucker leaks like a sieve anyway. So I thought I'd share what kind and brand ac this is. These are high maintenance and I hate them. This one's a 8000 BTU. Still cools great, but I didn't expect to have to change air conditioner diapers. I would avoid these kind if I were you.