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Thread: Toilet flushing problem

  1. #1
    DIY Junior Member husky's Avatar
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    Default Toilet flushing problem

    We just started having a problem with flushing. When we flush it does not seem like it wants to draw the water down right. I have pulled off the air vents under the sinks and it flushes right. Have installed new vent caps but did not help. Any ideas?? And yes this is on a double wide trailer.

  2. #2
    Moderator & Master Plumber hj's Avatar
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    IF it flushes with the "air vents" off, it is NOT a problem with the air vents. You have a plugged sewer, or at least the pipe is full of water for some reason. That is a problem with "air vents" which does not occur when the vents are installed properly so you do not need them.
    Licensed residential and commercial plumber

  3. #3
    In the Trades Gary Swart's Avatar
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    What are "airs vents"? Inquiring minds want to know. I'm just a dumbass DIY, but I've never heard this term before.

  4. #4
    DIY Junior Member husky's Avatar
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    Thanks HJ. The air vents I'm talking about are just a one way valve. They were to cheap to run the pipes right!!

  5. #5
    Retired Defense Industry Engineer jadnashua's Avatar
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    Quote Originally Posted by husky View Post
    Thanks HJ. The air vents I'm talking about are just a one way valve. They were to cheap to run the pipes right!!
    Those are generically referred to as AAV (air admittance valves)...note that they can't be the ONLY vent - you still need at least one atmospheric vent out the roof for the overall system to work properly.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  6. #6
    In the Trades Gary Swart's Avatar
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    I believe AAVs are not OK for toilets anyway.

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