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Old 02-28-2009, 10:48 PM
 
Location: Floribama
9,051 posts, read 16,485,330 times
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I have noticed several times when it's very windy outside (tonight it's 30mph) that I can see the water in my toilets fluctuate up and down, it does it worse when there is a gust. What could cause this? I have a septic tank so I'm assuming the wind must influence it somehow. Maybe something to do with the pressure inside of it?


I swear I'm not making this up. lol
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Old 02-28-2009, 10:50 PM
 
Location: Downtown Orlando, FL
573 posts, read 1,004,307 times
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I haven't the faintest idea, but I gotta say.....doesn't sound good.....lol....
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Old 02-28-2009, 10:59 PM
 
Location: Floribama
9,051 posts, read 16,485,330 times
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Quote:
Originally Posted by ilovebdj View Post
I haven't the faintest idea, but I gotta say.....doesn't sound good.....lol....
LOL, I'm not really concerned because I just had the tank pumped last summer and the toilets have never backed up that I can remember. I just think it's strange.
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Old 02-28-2009, 11:24 PM
 
Location: Houston, Texas
10,427 posts, read 30,013,414 times
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On your roof there is a 4" vent stack. If you ever blow across a soda or beer bottle you can make that whistle sound right? That is kind of what happens when the wind blows across that vent stack. It will also create a little bit of a positive pressure on the water seal inside your bowl. There is a volume of water inside your bowl that performs the same function as a P trap under your sinks which is a water seal preventing sewer gases from entering the home. That little bit of positive pressure will cause the water to move ever so slightly in the bowl. That's the best I can explain it.

Nutty as it sounds......it's true.

No need to worry about anything. It can do no harm.
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Old 02-28-2009, 11:46 PM
 
Location: Floribama
9,051 posts, read 16,485,330 times
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Quote:
Originally Posted by desertsun41 View Post
On your roof there is a 4" vent stack. If you ever blow across a soda or beer bottle you can make that whistle sound right? That is kind of what happens when the wind blows across that vent stack. It will also create a little bit of a positive pressure on the water seal inside your bowl. There is a volume of water inside your bowl that performs the same function as a P trap under your sinks which is a water seal preventing sewer gases from entering the home. That little bit of positive pressure will cause the water to move ever so slightly in the bowl. That's the best I can explain it.

Nutty as it sounds......it's true.

No need to worry about anything. It can do no harm.
I didn't even think about that vent up there. That's a good explanation.
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Old 03-01-2009, 12:14 AM
 
Location: Under a bridge.
3,196 posts, read 3,382,439 times
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I think it is my deceased ex-wife attempting to invade your home through the toilet. She is one of the un-dead now.
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Old 03-01-2009, 08:33 AM
 
3,528 posts, read 5,852,539 times
Reputation: 4637
Quote:
Originally Posted by southernnaturelover View Post
I have noticed several times when it's very windy outside (tonight it's 30mph) that I can see the water in my toilets fluctuate up and down, it does it worse when there is a gust. What could cause this? I have a septic tank so I'm assuming the wind must influence it somehow. Maybe something to do with the pressure inside of it?


I swear I'm not making this up. lol
Has everything to do with pressure and the vent stack. Its not a problem - its just science and nature having a go at ya!
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Old 03-01-2009, 01:00 PM
 
Location: Central Fl
2,901 posts, read 6,722,266 times
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The above posts are correct. It is just wind blowing across the vent pipe(s).
I'll just add that some folks have more then one vent pipe, they can be 1.5 inches to as large as 4 inches.

Bottom line...nothing to worry about.

Frank D.
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Old 03-01-2009, 11:03 PM
 
Location: Lompoc,CA
1,176 posts, read 3,034,892 times
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Ive seen this happen in a previous house. Havent noticed in our current
home. Guess I just havent been near the toilet when the wind blows,or
thought to look.


Greenchili
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Old 03-02-2009, 06:43 AM
 
Location: Oswego, IL
5,664 posts, read 6,768,214 times
Reputation: 35157
Quote:
Originally Posted by faithfulFrank View Post
The above posts are correct. It is just wind blowing across the vent pipe(s).
I'll just add that some folks have more then one vent pipe, they can be 1.5 inches to as large as 4 inches.

Bottom line...nothing to worry about.

Frank D.
Nothing to worry about until dcashley's ex comes swimming out and eats your brain.
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