I'm trying to help a neighbor diagnose and repair a problem with her
rather new (and expensive) Kohler Rialto low flush toilet. She seems to
have accepted the fact that she often has to jiggle the flush valve to
stop the draining past the flapper into the bowl which causes, of
course, repeated short refills. Observing the mechanism, I noted
something which I've not seen discussed here or in the Kohler
literature: the arm which holds the chain connected to the flapper valve
does not extend to the center of the tank, and therefore when the
toilet is flushed, the chain pulls the flapper somewhat off center to
the left. Altho the flapper parts are quite flexible, this off center
pull-off from the seat generally results in the flapper, in its return
as the tank empties, to land off center onto its seat, resulting in
incomplete shut off of the water flowing into the bowl.
The problem looks so obvious I can't believe others have not experienced
it. I'm considering getting a replacement flapper, perhaps of another
brand to see if this problem won't recur, but I've noticed that one
poster in June concluded that he bought two replacements which did not
help what sounds like a similar problem. (This is a flapper unit which
fits around a rectangular overflow pipe, and so is not so "standard" as
the types which merely clip onto a couple of little studs.) But perhaps,
do you think a name brand like Fluidmaster might have a solution to
this? I'm hesitant to call Kohler for fear of getting a scripted answer
("is it plugged in?" . . . "have you tried re-formatting and rebooting"
or some such advice)
drartie atsign attd0tnet
My first question - Has it always done this?
2) Have you tried a new Kohler flapper? I would try that first. Its
inexpensive and will guide you as to what to try next.
3) if its always done this, and a new Kohler flapper doesn't solve then
try the following next.
You say that the chain pull somewhat sideways and you suspect this is
causing the issue. Can the arm from the flush handle be bent so it is
positioned directly over the flapper? If its plastic, try replacing it
with a handle with a brass rod that can be bent into correct position.
Did that fix it?
if not - check to make sure there is no debris or damage to the flange
the flapper sits on.
if not - Call Kohler, see if they can offer a suggestion.
if not - Consider replacing the entire flapper/flange/overflow.
Typically they are one assembly. Not sure about your specific model.
DO NOT - Get the fluid master flapper/flange combo with glue that
sticks to the existing flange. These have never worked well for me. I
ended up pulling it out and replacing the stuff as mentioned in
So - As you can see - Check obvious, try less involved, less expensive
things first. Worst comes to worst replace the troublesome parts and
everything they touch.
Thanks for the quick response.
2) No but that's what I'll try next.
The arm is metal and in a position where bending anything couldn't help
I will bite the bullet and call Kohler, as well, and keep you poster.
I don't wnat to do anything that might ivalidate the warranty, but it's
unlikely that changing a rubber gizmo can be considered an unauthorized
I think I have a similar model Rialto or maybe close to it, low profile
single piece Kohler toilet. It's had a drip since day one and I tried
two replacement flappers from HD specifically made for my model.
Neither of them even fit, which was strange since I even bought the
unit at HD. I never felt like wasting my time on the phone for a
toilet. I forgot about it becuase I think I've only heard it
self-flush like once or twice in the past three years.
Thanks, guys. I bit the bullet and called the Kohler help line and was
surprised by the speed and efficiency with which I was "answered." The
customer rep appeared to be quite familiar with the problem and
specified exactly which link of the chain that hook should be on (the
6th from the flapper) as well as reminding me that the hook should be on
the hole at the end of the lever. She said I probably didn't need a new
flapper. Nevertheless, I bought a new flapper and installed it per her
instructions, and currently it appears to be working. I do have some
lingering doubts about the design of this system, since the flapper
continues to be pulled a bit off center and lands on the valve seat only
a fraction of an inch (? 1/16th inch) away from leaving a gap through
which water will leak. But after many test flushes it has not leaked.
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