Pool is filling up by itself!

[tstex]

Although this is a slightly older thread, this is a reasonable an explanation!

Maddie

What explanation ?

 

[tstex]

I have the same exact situation that a few people describe here and I also live in the desert in CA. No idea where the water comes from, but this theory could make sense. Since it is hot during the day and cool at night the pool releases heat at night and gets cold. During the next day, humid hot air hits the cold pool surface and cools down. When the humid hot air cools, it no longer has the capacity to hold so much water so condensation forms, filling the pool. Is that crazy? I have not put water in my pool all summer but it fills itself - no cracks in the plaster - no leaks in the fill valve.

Jake, to test this theory, get the largest glass container you can with the greatest top surface area, fill it, mark the fill line w a blk sharpie in the morning. Then see what the water line is at dusk and mark it with a blue sharpie [detects evap rate]. Then examine and look at lever in the morning...if there is a true cooling and condensation effect, it will be reflected in your glass container too, which has to make up for the evaporation and then exceed the originally marked line. Also, if this theory was correct, why do reservoirs in the desert areas always seem to decline until rain waters are introduced?

Finally, I can assure you that NO WATER is coming up from the ground and penetrating the gunite shell and plaster...

 

[JoyfulNoise]

Air hits cold surface at night and causing water to condense ?? This probably needs high humidity.
I have seen my pool level goes up by an inch with no rain and fill faucet is tightly closed.

I have the same exact situation that a few people describe here and I also live in the desert in CA. No idea where the water comes from, but this theory could make sense. Since it is hot during the day and cool at night the pool releases heat at night and gets cold. During the next day, humid hot air hits the cold pool surface and cools down. When the humid hot air cools, it no longer has the capacity to hold so much water so condensation forms, filling the pool. Is that crazy? I have not put water in my pool all summer but it fills itself - no cracks in the plaster - no leaks in the fill valve.

I sincerely doubt this theory.

Using data from Engineering Toolbox - water-vapor-air-d_854.html

Assuming a volume of air is 70F and at 70% RH, the weight of water vapor in air is 0.0112 lbs of water per pound of dry air. At seal level and standard temperature and pressure, 13.15 cubic feet of air weighs about 1 lbs. Pool surface areas can vary but they are roughly 400-600 sq ft. Let's just simply use 400 sq ft.

1" of fill water into a 400 sq ft pool = ~ 250 gallons of water.

400 sq ft of surface area with a 12" of humid air above it, represent ~ 400 cubic feet of air. 400 cubic feet of dry air would weigh ~ 30.4 lbs and at 70F and 70% relative humidity, the air would hold ~ 0.34lbs of water. 250 gallons of water (1" of pool volume) weighs approximately 2097.5 lbs.

So one would need a turnover of over 6,000 volumes of air 1 foot above the pool to completely desaturate with water in order to fill the pool by one inch....seems highly unlikely to me. Not only will most of the air above the pool remain saturated with water, any volume of air that does add condensation will only change it's relative humidity by a small fractional amount.

Whatever the source of this water is, I sincerely doubt its coming from the heavens above ....

 

[JamesW]

Whatever the source of this water is, I sincerely doubt its coming from the heavens above ....

I still think that it might be from asteroids.

Most of Earth's Water Came from Asteroids, Not Comets

Scientists now think that Earth's water was probably delivered by asteroids, not comets, in the early epochs of the solar system billions of years ago.

www.space.com

 

[setsailsoon]

I read they recently discovered water on the sunny side of the moon also. Maybe some is dripping into his pool which happens to be just in the right location.

 

[DanF]

I read they recently discovered water on the sunny side of the moon also. Maybe some is dripping into his pool which happens to be just in the right location.

LOL! Time for Pink Floyd to get back together for a "Sunny Side of the Moon" album.