Approx 2 weeks ago I rebulit an old Buckner valve (which Ewing now sells under their name). Replaced the diaphram and top end and it worked fine. Got a call today and the valve was stuck open. HO eventually turned off the water supply. I went out and turned the water back on and the valve had closed. I went ahead and pulled the top and checked for debris and flushed the valve. It was working fine when I left but am wondering if it's going to act up in the future. Don't really want to bill the customer till I know it's right. Ever worked any similiar cases or have any thoughts?