After flushing ,the tank refills and stays full, then the water in the bowl drains out. What causes this ?

Does it drain out right away or does it drain out over a period, say 5 minutes?

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Originally Posted by J2ranch

After flushing ,the tank refills and stays full, then the water in the bowl drains out. What causes this ?

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There is a little hose on mine that feeds of the valve that fills the tank and it goes down a tube that fills the bowl while the tanks being filled

J2ranch said in PM;

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It takes about 45 seconds to drain the bowl, after the filling of tank is completed.

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Ok, you flush, the bowel flushes completely, the tank refills and the bowl refills. Over the next 45 seconds the water in the bowel slowly disappears. Is that correct?

After water in bowl has mysteriously disappeared, hold down float in tank until bowl refills again. Do not flush.

If water disappears again you have a cracked toilet. If it does not you probably have a blocked vent pipe.