American Standard Toilet Flushes Randomly. What Could Be Wrong?

2 Answers

Larry Patterson Profile
Larry Patterson answered
I am not a plumber but if the toilet is flushing a large amount of water has to drop down from the tank.  The flapper (or equivalent) has to open wide before a large amount of water can leave the tank.  The flapper itself is defective or some other component in the tank is causing the flapper to open at the wrong time.
Are you certain that the toilet flushes or do you just hear the tank refilling partially?  If water slowly leaks out of the tank (look closely in the bowl you may see a faint trail of water bleeding down continuously) it will lower the level in the tank until the valve reaches a point that it will let more water come into the tank, and you may be hearing the tank being refilled.
There are many types of flush and refill mechanisms but if water is leaking it probably involves the flapper (or if it is flushing) or other device that closes off the big opening that allows water to pass from the tank to the bowl.  A very, very small amount of leakage will cause faulty operation.  One way to tell is to put food coloring in the tank and see if it appears in the bowl without any flushing.  If it does there is leakage.
thanked the writer.
Anonymous
Anonymous commented
I don't think that's the problem cause i checked those things. I'm thinking
that the trap is blocked. Whats a good way to inspect the trap? Or a good way to clear the trap
Steven Vakula Profile
Steven Vakula answered
Your flush valve is leaking and most likely needs to be replaced. These can be purchased at any hardware or home improvement store. You need to remove the lid from the retention tank to replace this item. You also need to be able to shut off the water supply while replacing.

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