Call for toilet not flushing. Mr. Harrison states that the toilet is overflowing, and won’t flush. Water was turned off to unit to stop overflow. Arrived and used plunger on site to clear localized blockage. Removed failed flapper and installed new two inch flapper, adjusting chain to appropriate level. Toilet is an older Kohler 1.6 gallon flush toilet. Due to age and condition, toilet should be rebuilt or replaced soon. As other gaskets or components have a risk of failing. I recommend contacting water service provider to request bill adjustment, as toilet has been silently running for some time. Service Technician: Shawn