vent blockage?


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Old 12-19-19, 05:46 AM
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vent blockage?

when the city sewer cleaning truck comes by they suck the water out of some othe drains and the toilet BUT when the wind blows there are white caps in the tolet. Is this a vent problem
 
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Old 12-19-19, 10:22 AM
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Possibly, though it could also be a blockage in the drain too. Partial blockages often 'look like' vent issues, even though they aren't.

Other than the city coming around, do you have any problems with flushing or draining? When you say 'white caps', is it really that turbulent? Or do you just see the water moving a bit?
 
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Old 12-19-19, 10:27 AM
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How far does your vent pipe extend above your roof?
 
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Old 12-20-19, 06:51 AM
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not really white caps but water is moving, here in central Wyoming wind of 35 to 55 mph are fairly comman.
No problems with draining or flushing.
Vents are about 10 inches above the roof and below he roof peak.
Should have mentioned that the house was built in 1968
 
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Old 12-20-19, 07:21 AM
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It's normal for air pressure from wind to cause traps to move and sway. The water in your toilet bowl is the trap... Just like the trap under a sink. Mine does it anytime the high wind is from the north or northwest due to the location of the vent stack. High south wind- not so much... The roof shields it somewhat.
 
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Old 12-21-19, 02:52 PM
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Sorry but I feelI did a poor job of asking the question.
The main thing I quess I was asking about is when then city sewer vacuum truck comes though, is it normal that they suck several of the drain traps empty
 
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Old 12-21-19, 02:55 PM
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If they are sucking the pipes, the air they are sucking has to come from somewhere, does it not? Yes, its normal. The vac motor they use has such high volume that it sucks air thru your vent which probably moves air at such a high velocity that the negative pressure siphons some of your traps too.
 
 

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