Hello campers I’m finally back in the camping game. I have a 02 Coleman Niagara elite. And this is the first time I’ve had restroom/shower. Couple of things. At first I wasn’t getting hot water. I read through a few threads about the check valve. So I went all over with that. So finally I found that the line was clogged with calcium chunks. So after sucking and blowing the line out a couple times I finally got it clear and now I have good water pressure. So on to the sink and shower. My question is since I don’t have a grey water holding tank. How should I drain the water when showering or using the sink. Is there some sort or exterior holding take that I should get to hook up?