Tecma water level dropping quickly
I have a 2012 Journey 42E with a Tecma toilet in the rear bath. I am on city water and have programmed the water levels as per directions on the toilet. When I flush the water goes to about a half an inch above the outlet but then quickly drops to about a quarter inch above and then slowly empties from the bowl. Any suggestions as to what I need to be looking at would be appreciated.
2012 Journey 42E