: : Sometimes cleaning the fill valve works. If not, replacement of the "cap" fixes it.
: : Toto has service parts for these fill valves. 800-350-8686
: : Instructions for cleaning are at the link below. Terry Love

: : : My toilet keeps running. Water fills up, in tank, past overflow hole and doesn't stop. Is there something I can do to the flushing system, or should I just replace it? I've never seen this type of flushing system (G-max) that doesn't have a floater.

: I had a similar problem with a Toto toilet. I went to a local plumbing outlet that handles Toto, described the problem and he gave me replacemet control unit - free. Their warranted for 5-10 years. I replaced the unit and it still cycled - the real probleem was the seal on the flapper $1.25.