I'm having trouble finding any valves to use for my certain application. What I'm doing is trying to capture water droplets into a sealed container. What I need is some sort of check valve that needs nearly no pressure to let water through, but keep it contained once it has gone through the valve. Although I know this would be some sort of check valve, I have yet to find a type of check valve that will work. It will have to be oriented vertically, and must be automatic, meaning that I shouldn't have to open and close it manually or electronically. A swing, or tilting disk valve looks like it could work, but I'm not sure whether the disk would move when rotated around. Additionally, I've found ball drip valves, but haven't been able to really find out enough information to know whether or not it'll work. I know this isn't exactly a mathy or complex issue, but I figure somebody here must know what I'm talking about.