Possible vent issue on a kitchen island with kitchen sink in it

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by strad, Feb 2, 2014.

  1. strad

    strad New Member

    Joined:
    Feb 2, 2014
    Location:
    Nevada
    We have several houses that we lease. On one of them, the tenant called and said the kitchen sink wasn't draining. Fine, used a 25 foot snake, found an obstruction at about 15-18 feet in, after several tries got it to drain properly. BUT, in the process, based on what we were seeing, we THINK that the only venting that is going on is, say you're using on side of the sink, the venting is being done from the other side of the sink. We think there might have been an obstruction between the garbage disposal and the other side, which we were able to clear out by running the garbage disposal. Possibly the vibration cleared it. In other words there was more going on than just the obstruction downstream, but not sure what.

    Anyways, keeping in mind that this install is on an island, and although we have no way of knowing for sure, that it was probably done when the house was built, how would the thing be vented? Inside the wall? Vented as above (which I doubt since that is definitely not an idiot proof way to do it)? Or could the vent be obstructed in some way? I mean, the sink works now, from both sides, but we have a sneaking suspicion that it isn't "right". I don't want to call a plumber if the problem might be simple and easily accessible.
     
  2. 6t7gto

    6t7gto DIY Junior Member

    Joined:
    Jan 20, 2010
    Location:
    Bedford, Ohio
  3. Sponsor

    Sponsor Paid Advertisement

     
  4. Jerome2877

    Jerome2877 In the Trades

    Joined:
    Aug 25, 2009
    Location:
    BC
    The vent is not the problem and if there, it is on the downstream side of the trap. The sink outlets would not act as a vent.
     
  5. strad

    strad New Member

    Joined:
    Feb 2, 2014
    Location:
    Nevada
    6t7, that is a possibility I guess. Only ways to know would be to either open the wall or get a scope in there. Another thing that is weird on this house is that I cannot find a cleanout anywhere on the outside of the house. And I did not see a readily apparent main line cleanout either. All our other houses (similar age, same city) have those two cleanouts. There was a cleanout right under the kitchen sink drain line. In any case the thing is working now, and seems to be working well enough, so I guess we wait until something else happens, and at that point we might call our plumber.
     
  6. Master Plumber Mark

    Master Plumber Mark Master Plumber

    Joined:
    Feb 6, 2005
    Occupation:
    Sensitivity trainer...to be caring and loving to a
    Location:
    indianapolis indiana - land of the free, home of
    why not save yourself a lot of time and just install an auto
    air vent under the island sink.... its not worth trying to figure out
    what went wrong with some old vent going up some wall....

    just add an extra auto vent
     
  7. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    An "island sink" does NOT have any wall that the vent could go up, so it either needs the "island drain" piping, (or a pipe running up through the room into the ceiling), or an AAV for a vent. Or do you mean the sink in in a "peninsula" in which case the vent probably does go up the side wall. One sink does NOT vent the other one because any vents are AFTER the traps, NOT in the sink.
     
    Last edited: Feb 3, 2014
Similar Threads: Possible vent
Forum Title Date
Plumbing Forum, Professional & DIY Advice Floor drain backup - toilet water disappearing - possible Vent issues Jan 14, 2013
Plumbing Forum, Professional & DIY Advice Possible sink vent? Aug 24, 2012
Plumbing Forum, Professional & DIY Advice confused, need possible reasons Aug 19, 2015
Plumbing Forum, Professional & DIY Advice 2 dishwashers, one disposal. High loop possible? Jul 17, 2015
Plumbing Forum, Professional & DIY Advice Possible leak in 1 year old shower at floor/wall intersection Mar 30, 2015

Share This Page