A toilet that cuts on and off by itself, or runs intermittently, has a problem that plumbers call a "phantom flush." The cause is a very slow leak from the tank into the bowl. ... The solution is to drain the tank and bowl, check and clean the flapper seat and then replace the ...
you raise the chain which lifts the flapper and allows water to flow into the bowl. If the chain is too long or too short, it could interfere with the way the flapper sits in the tank and create gaps, resulting in a toilet that runs occasionally. Luckily, adjusting the chain ...
A toilet that cuts on and off by itself, or runs intermittently, has a problem that plumbers call a "phantom flush." The cause is a very slow leak from the tank into the bowl. This problem is almost certainly caused by a bad flapper or flapper seat. ...