[ccjohnson]

The water in and flapper are controlled electrically. When you flush the flapper opens & fresh water in starts the cycle. Then the flapper closes & fresh water in continues to fill bowl to pre-set level. Microphor's web site should have details available. I have had to replace the timing cam once, other than that it works pretty good. Once in a while timing hangs up & it takes a second lever push to complete cycle.