sink fills with hot water drains with cold water

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sink fills with hot water drains with cold water
Author: twinkles (GA) Little oddity. Happens in both bathroom sinks. You turn on the hot water and once it gets hot, the sink starts filling like the drain is clogged. As soon as you add cold water, making it luke warm, the sink drains. Not a major issue, but I am just curious why this is happening.
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Re: sink fills with hot water drains with cold water
Author: steve (CA) Are both sinks in one bathroom? Back to back bathrooms? or not either of the previous?
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Re: sink fills with hot water drains with cold water
Author: m & m (MD) Maybe it's not so much the temperature of the water as the height of the water in the bowl??
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Re: sink fills with hot water drains with cold water
Author: twinkles (GA) Yes both sinks are in the same bathroom. My wife's and my sink. We both noticed independently and one of us mentioned, and the other said, my sink does the same thing.
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Re: sink fills with hot water drains with cold water
Author: twinkles (GA) No, it seems to be the temperature of the water. You turn on all hot and when it starts running hot, the sink starts to fill. Then you add some cold water to the flow, and a few seconds later, the sink starts to drain. Very strange.
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Re: sink fills with hot water drains with cold water
Author: Wheelchair (IL) More air bubbles in HOT waters than COLD water ? Best Wishes
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Re: sink fills with hot water drains with cold water
Author: steve (CA) Do the sinks have stoppers or grid screen drains? If stoppers, remove a stopper and see what happens.
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Re: sink fills with hot water drains with cold water
Author: MattCarter (NJ) Try a controlled experiment: Fill a bucket with cold water, pour it down, and time its draining with a stopwatch. Then, wait a few minutes and repeat the experiment with a bucket of hot water. Please post the results back here.
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