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Plumbing in the Home/Toilet bowl water low, tank filled


Hi Dana,
In my spare bathroom when I flush the toilet, instead of the water draining from the bowl, it actually goes higher, then drains to almost nothing by the time the tank is done filling.  The tank is filled where it should be (about an inch below the water fill tube). I don't seem to have any issues in the nearby sinks.  Any ideas?


Hi Jane,
This sounds like a partial blockage in that line. It takes good flow down the drain line to clear the bowl properly.

Normally, the water level in the bowl is dictated by the height of the trap weir that is cast into the actual toilet base. There is no way to adjust this level. It does not depend on the water level in the tank.

Getting that toilet's drain line cleaned should handle this problem.

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Dana Bostick


Pretty much any residential plumbing questions. For "item specific" details such as a specific model of fixture, I will need to research and there may not be any useful information available. Note: I live and work in Southern California. We do not, as a rule, use hot water or steam heating systems, oil fired boilers or private water wells so my knowledge in those areas is pretty limited. There are others here on AllExerts that can probably answer those questions better.


Retired, Licensed General Contractor with Plumbing license. Active Home Inspector, Litigation Consultant and Infrared Thermographer, Online Marketing specialist.

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