island sink drain slow/not drain & toliet slow/not flushing

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by aot2002, Aug 21, 2008.

  1. aot2002

    aot2002 New Member

    Messages:
    3
    I've got a 86 trailer which I bought and found i got into some plumbing trouble.

    the shower/tub, bath sink, and toliet is at one end of the house and then of course the island is at the front end.

    so the island never had a roof vent and only the cheater vent, although i just bought it and never ran the water for an extended period to test the drains.

    anyway I started seeing the sink drain slower and slower and now it doesnt drain, so i replaced the entire setup under the island in hopes maybe it would fix the issue but still it wont drain and gurgled at first before the drain stopped working.
    I tried drano and such etc...no luck, i do remember the sink pipe had nasty gunk in it (filling 1/4 of the pipe up) and stinks terrible.

    now the toliet is not going down but yet the sink and shower work fine in the same bathroom...?

    at first i thought its got to be the septic backing up ....But how can the washer, bathsink, and shower all work great but not the toliet and island?

    if anyone can shed light on this mystery i'd be so happy
  2. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    Climb under it and see where the pipes are all sagging.
  3. aot2002

    aot2002 New Member

    Messages:
    3
    was that a real comment or you bustin my chops?

    you think the pipe is sagging for the island....what explains the issue with the toliet or do you think that has a problem of its own?
  4. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    No, that's a real comment and a real problem with old trailers (some new ones too)
  5. aot2002

    aot2002 New Member

    Messages:
    3
    I'll let you know how i make out tomorrow when im buried in dirt from being under it :(
  6. Redwood

    Redwood Master Plumber

    Messages:
    7,453
    Location:
    Connecticut
    At best you have a long flat run with almost no pitch.
    At worst you have a buch of saggin going on,
    In any case a snaking is needed.
    Getting rid of sags will help keep it working longer And prevent the drain from freezing up in the winter.
  7. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,245
    Location:
    Cave Creek, Arizona
    drain

    You are seeing a major problem with the "cheater ventsAAV". When the drains start to get slow, which is your real problem, the AAV will not let the sink drain. If you remove it, the sink will probably work properly, but you will still have the partially plugged drain problem.
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