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-   -   Is this an s-trap problem (https://www.askmehelpdesk.com/showthread.php?t=718304)

  • Nov 21, 2012, 03:38 AM
    elpeacen
    Is this an s-trap problem
    After p-trap, waste pipes goes level for 6 inches, then drops about 3 inches before going into walls, under bathroom sink. Is that a danger of s-trap siphoning if large volume goes down sink drain? Is this an S-trap? Or is it safe because of the level 6 inches of pipe?
  • Nov 21, 2012, 06:04 AM
    massplumber2008
    1 Attachment(s)
    If the Ptrap doesn't connect into a vent then yes, you have an Strap there. To resolve this you could connect a mechanical vent (called an AAV.. air admittance valve) just after the Ptrap and that would fix the issue.

    Mark
  • Nov 21, 2012, 06:45 AM
    speedball1
    1 Attachment(s)
    And here's how it looks,(see image) Good luck, Tom
  • Nov 21, 2012, 09:54 AM
    elpeacen
    Thank you very much.

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