I have five Little Giant waterers in five pens. Two I bought at the local feed store and three I ordered through Cutler Supply. The ones I got from Cutler now leak. Not sure if there's a connection there or not. I know how to adjust the water level and tried that. The problem is that when I remove the outer stem, the valve underneath leaks. It should shut off unless the pieces on the end are pressed. I tried pressing them to clean them out in case some debris is caught inside. Water sprayed everywhere, but the valve still leaked when I released the end. I can see no way to get into the valve to clean it out. I've sent emails to the Little Giant manufacturers and to Cutler Supply asking for advice on this. Other than purchasing new valves for $9 on a regular basis, I see no other way to solve the issue. I love the waterers and don't want to try to rig up a new system. Has anyone had similar issues? If so, what did you do to resolve it? Thanks!