Made a 5 gallon waterer from posts on this site. Can't seem to get it to work right. I used the bottom of a small blue barrel and cut it down to an appropriate height. Got a 5 gallon bucket with a lid and drilled 3 holes around the lip of the bucket. When I filled it with water and turned it upside down into the blue tray the water would come out of the holes for about 5 seconds, then the flow would stop as soon as it built up a vacuum. The water level is below the drilled holes of the bucket, but it does not fill up in the tray. The water does not come up to the holes as I thought it was supposed to. Not sure how to fix, Any help would be great.