Question about Toto Promenade, 1.6 GPF, Elongated Two-Piece Toilet, Cotton - CST424SFG

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The water filling the tank does not turn off, it keeps running

After the tank fills to shut off point the water keeps filling the tank. The water goes into the overflow and does not turn off. It says on the back of the tank the water should shut off when the water reaches 1/2 inch from the over flow. How can I get the water to turn off where it is supposed to?

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It sounds like the fill valve is not operating correctly. Remove the fill valve which it the tall item inside the tank where the water runs through and replace it with a universal replacement part from your local hard ware store. Take the valve to the store so that you can get the proper replacement piece.

Posted on Jul 17, 2010


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Posted on Jan 02, 2017


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1 Answer

My toilet fills very slowly and only half way

There are multiple things to diagnose on a problem of this nature. I will give you a starting point, and you can work from there. If you need further steps, let me know. It may be something as simple as debris caught in the diaphragm of your fill-valve. This is not uncommon. The top portion of your fill will pop off, but you must shut water to the tank off first, before removing the cover. Underneath the cover, you will see a black rubber diaphragm. Remove this diaphargm, and slowly crack open the shut off valve just enough to start water flowing. If you notice any debris come out, your problem is solved. Reassemble the fill-valve, turn water back on. If this is not the problem, Your fill valve may just be bad. They are relatively inexpensive. However, before buying a new fill valve (assuming that step one did not solve this problem for you) Turn the shut off valve back off. and remove the supply line going to the toilet. Get a bucket and aim the supply line into the bucket. If this is not a flexible supply line, this step will not work. However, if it is flexible, point it into the bucket and turn the shut off valve on. If you have adequate pressure at this point, it is definitely your fill valve inside the tank. If there is not adequate pressure, it starts getting a little more complicated to diagnose. However, I can still walk you through those steps as well, but start where I recommended, as this is most commonly the problem.

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