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Old 01-27-2022, 01:01 PM   #1
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? For Science Guys

On two separate occasions a one gallon water bottle that I stored in the basement seems to have leaked. When I remove the bottle it no longer leaks.

What could cause this? I should add that the bottle is not the cheap bottle you get at the grocery store, but a sturdy bottle purchased at a plumbing supply store. Also, the leak is crap confined to the plastic container in which it sits.

Nick
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Old 01-27-2022, 01:21 PM   #2
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Water has its maximum density at close to 39f. So if you are filling the bottle full and the water temp is colder than that (39f) and warms up the water will expand until it reaches the 39f and then start contracting again, same is true for the opposite if the temp is warmer and then it gets closer to 39f in the basement.

The above is in regards to the density of water, however if you have an air gap in the bottle with the water (as you should have) then the expansion and contraction of the water itself shouldn't cause enough pressure change for the water bottle to leak. The air pressure for the air gap in the bottle could also change with a change in altitude (more pressure as you gain altitude).

I would suggest leaving a larger air gap in the bottle when filling them and see if that takes care of the issue. ~CA
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Old 01-27-2022, 01:56 PM   #3
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Great info, thanks. I knew there was a scientific answer to my question! I’ll follow your advice.

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Old 01-27-2022, 02:18 PM   #4
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Also, If you change altitudes the differences in air pressure can cause a bottle to leak.
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Old 01-27-2022, 02:29 PM   #5
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I have a water bottle that lives in a cup holder in the truck. This time of year it will sweat and accumulate quite a bit of water in the cup holder.
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Old 01-28-2022, 10:55 AM   #6
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I've seen instances where an unopened bottle of water would "lose" water over a period of years, and the bottle would actually start to contract. The water was apparently "evaporating" through the thin plastic bottle and since it was sealed air could not get in to replace the water...
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Old 01-28-2022, 07:14 PM   #7
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Are you seeing water missing or just water in the outer container? Maybe just condensation on the bottle accumulating in the outer container. The water will remain cold as the temperature warms causing condensation.
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Old 01-28-2022, 07:24 PM   #8
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Science says there's too little data to draw a conclusion.
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Old 01-28-2022, 07:36 PM   #9
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Quote:
Originally Posted by traveler of california View Post
On two separate occasions a one gallon water bottle that I stored in the basement seems to have leaked. When I remove the bottle it no longer leaks.

What could cause this? I should add that the bottle is not the cheap bottle you get at the grocery store, but a sturdy bottle purchased at a plumbing supply store. Also, the leak is crap confined to the plastic container in which it sits.

Nick
2014 Allegro Red
Without reading all best Guess is Elevation Change - sort of like the chip bag when you go over a high pass in Colorado.

Or

Possibly temperature changes.

JMHO,
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