“I orgered 6 of the flush valves. The first one wouldn't shut down - water kept coming full-force. Then the second one did the same thing. Finally, I folded the the tubing over and clamped it closed.
I don't know if it was my fault, but I've been using these for many years.”
Hi - thanks for your review. We have a YouTube video that explains how this flush valve works and shows how to open the valve and check the diaphragm. I'd suggest opening up the flush valve and see if the diaphragm appears to be faulty or installed incorrectly at the factory. https://www.youtube.com/watch?v=kvf3NCidmCQ&t=71s
