Two of my toilets are of the same model. Both are made by American
Standard and both use the flapper as shown in the following link:
Lowe's sells this flapper for around $9. Here, I need to pay more than
$30 for it.
About three months ago, one flapper would not come down after flushing.
I thoroughly cleaned it and then put it back. It started to leak. I
tried many things but ended up buying a new one.
Now, the other toilet has the exact same problem. Yesterday, I was
informed that the flapper would not come down. I went to check it. It
was not leaking at that time. I removed the flapper and cleaned it.
After I put it back, it started to leak, just like the other one. I used
a toothbrush and a plastic brush to clean. They should not damage the
Can anyone explain why a flapper which was not leaking leaks after
cleaning? Much appreciated.
I don.t remember ever clng a flapper but tank seat for it. We have
pretty hard water. Flapper is made of pretty springy rubber like fish
fins. Rough handling it may render it no good. For slow leak check use
some dye drops.
The water tank is coated with a layer of black gunk, up to the water
line mark. The chain, inlet valve, flapper, everything is coated with
the black gunk. It is not difficult to remove. It just take time.
The reason the flapper stayed up and refused to come down is because the
drain hole on the flapper was plugged with the black gunk.
There is no need to use dye to check for leaking. Two minutes after the
water tank is full and water is cut off (no hissing sound) water starts
to slowly fill again. This is definite a sign of leaking.
did you also clean the rim that the flapper
sits upon to seal?
our water tank builds up gunk that i need to
clean out once a year or so. also clean the
rim so that is is smooth once again, but along
with that i take the flapper off and clean it
and put a very thin layer of vaseline on it
which keeps it going for another year.
Both toilets are more than 10 years old. I understand that the flapper
probably has passed its useful life. I just don't understand why it did
not leak before cleaning but did so after cleaning.
Toothbrush is quite soft. The other brush is a bit harder. Yet, there is
no scratch marks on the rubber. The rubber has some "goose bumps". I can
only guess that gunk filled up the gap between "goose bumps". After
cleaning, the gunk is gone and the flapper starts to leak.
On Friday, October 2, 2015 at 2:26:52 AM UTC-7, John Smith wrote:
A toothbrush isn't enough. You need to scrub both the flapper and
the seat with a wet cloth or paper towel.
Goose bumps indicate the flapper was made of vinyl, or maybe a blend
of vinyl and rubber. They'll disappear after the flapper dries out
for a few weeks, and some vinyl flappers will also change from grey
back to black. But a vinyl flapper can develop a permanent set,
like a ring indentation where it pressed against the seat of the
drain, or even a warp, and it's common for them to not seal any
Did you also clean the seat (the part it rests on when it's shut). Clean
that too! Of that seat is worn or corroded, you may need to replace
that too. That requires removal of the toilet tank. Not a hard job, but
time consuming, and will probably require new tank to bowl bolts and
rubber seals as well.
I assume you checked to make sure the chain is not holding it up a
little, or some other object in the way....
On 02/10/2015 11:36, firstname.lastname@example.org wrote:
I cleaned the rim with my hand.
No. It is not the chain. Once the toilet is flushed, water starts to
fill up the tank. When the tank is full, water is cut off. After one or
two minutes, water starts to fill slowly, definite a sign of leaking.
What is causing the black gunk? Our main toilets are 50 years old and the insides of the tanks are barely coated with a light film of stuff. You can see right thru whatever has built up and read the original writing on the inside tank walls.
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