Toilet bowl water level

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Plumber1

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There is a small refill tube that comes off from rhe ballcock or fill valve inside the toilet tank. There has to be a stream of water that comes out of that tube. And that stream of water has to be directed to the tank overflow. The overflow may be a tube standing near the flapper or it may be a part of the tank casting.
Look and see.......
 
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Terry

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If the fill tube is in place, then the other determining factor is the height of the bend of the trapway.
The top of the bend, is like a "dam" holding water in the bowl.
The water will not go higher than the dam.
 

Jimbo

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The water level in the BOWL is not adjustable. Possibly you are getting no refill from the tank; also possible is a bad vent causing siphomn action, or a crack in the throat of the toilet/
 
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