Hi all! So I got some poultry nipples and PVC, and a bucket. I made this watering system you see in the picture. Apart from slight leaks here and there, which I can probably fix easily. The weird thing is that I used a length of clear hose to feed the pipe from the bucket, so that I could easily see what the water level was. However, the water doesn't flow in and fill the tube! It only trickles into the tube when the nipples are poked. Is this normal fluid dynamics? Am I not bleeding or venting it properly? This is without a lid on the bucket, so I thought the whole thing would fill up. Thanks!