prep sink draining slowly

Discussion in 'Toilets and Sinks' started by RustyShackleford, May 8, 2018.

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  1. May 8, 2018 #1

    RustyShackleford

    RustyShackleford

    RustyShackleford

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    island wall - horizontal ruler.JPG IMG_20180122_150604.jpg I installed this little prep/bar sink as part of my kitchen remodel, and it is draining very slowly (cannot quite keep up with the new, pretty low flow, faucet). I'm thinking I did something bone-headed, probably with the Stud-a-Vent. Here are a couple of pics. After it goes through the floor, it just goes to a 90 elbow and then a long correctly-sloped run to existing drain lines. I don't see what else could be wrong - can't possibly see how if could have gotten clogged. TIA !
     
    Last edited by a moderator: May 9, 2018
  2. May 9, 2018 #2

    TomFOhio

    TomFOhio

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    If your piping is all new and draining slow then it is plugged. Run a snake all the way to the main drain.
     
  3. May 9, 2018 #3

    CT18

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    Unscrew that AAV and see if it drains better.
     
  4. May 9, 2018 #4

    RustyShackleford

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    Unfortunately I accidentally got some PVC cement on the threads of the AAV, so cannot unscrew it (so yes, I definitely did something boneheaded). I'd have to hacksaw off.

    A friend who knows something about plumbing told be that the Stud-a-Vent is not high enough, that I need to be able to extend it up behind the sink a little more; which I can do, hacksawing it off and kludging it somehow, but I really don't want to do it unless I'm sure that's the problem. I swear I've seen AAVs mounted much farther below the sink in my friend's condo, but maybe it still came up from the horizontal pipe farther, and that's the issue.

    However, I cannot imagine how the pipe got clogged, it's had a sink strainer on it the entire time. But I guess I should run a snake down like @TomFOhio says, and make sure it isn't clogged before I go hacking into the AAV. Only problem is I don't own one, but I guess it's cheaper to buy one that a plumber's service call.
     
  5. May 10, 2018 #5

    Geofd

    Geofd

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    is the piece coming out of the trap into the larger pipe cut so its not blocking blocking the vent branch of the ty??????
     
  6. May 10, 2018 #6

    RustyShackleford

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    That's a DARN good question. Thanks for the suggestion. I'll get back to you tomorrow.
     
  7. May 11, 2018 #7

    RustyShackleford

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    Took the P-trap apart and no, the horizontal pipe is not too long and blocking the AAV. But the P-trap and the downpipe from the strainer were pretty clogged with grey crud. Cleaned all that up and it drains like a champ.

    So now ... this installation is only 1-1/2 years old. So why that clogged ? Not overuse. Maybe underuse, as the wife isn't used to having two sinks yet ? Something else funny about my install ?
     
  8. May 13, 2018 #8

    Geofd

    Geofd

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    no i think a clog is just that...a clog no real rhyme or reason.... whats the sink being used for?????? i know you said prep but if there is no disposal....then all it shoukd be used for is washing things off
     
  9. May 13, 2018 #9

    RustyShackleford

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    Maybe more a bar sink, but food scraps do get swept into it to some. But they get caught in the strainer. In fact, even when the strainer basket is completely clean, the drain cannot keep up with the faucet (a modern one, probably 2gpm or less).
     
  10. May 14, 2018 #10

    Geofd

    Geofd

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    before the drain has been cleaned???? how about with the cover out and a clean drain?????
     
  11. May 14, 2018 #11

    RustyShackleford

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    I'm not sure what your point or question is, sorry.
     
  12. May 14, 2018 #12

    Geofd

    Geofd

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    there is a cover that goes in the basket strainer so you can seal off the drain to hold water in the sink..... with that out how does it drain....
     
  13. May 14, 2018 #13

    RustyShackleford

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    My basket strainer doesn't have that cover, it just has a rubber stopper on the bottom, so if you don't want the sink stoppered, you turn it upside down.

    Before I cleaned out the P-trap etc, it drained very slowly even with the basket strainer completely removed. How the drain is cleaned, it drains very fast with the basket strainer removed, but still kinda slow with it in place (and in the upside down position).
     
  14. May 14, 2018 #14

    Geofd

    Geofd

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    if it drains fine with it out that's basically how it should work when you put the cover on it causes a bit of a restriction
     
  15. May 15, 2018 #15

    RustyShackleford

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    Sure, but my original problem was that it drained slowly even with the entire basket strainer (all movable parts) removed. Because the P-trap was clogged with gunk. And I dunno why that happened after 1-1/2 years.
     
  16. May 15, 2018 #16

    CT18

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    Did you have any tile or drywall work done in the area.
     
  17. May 15, 2018 #17

    RustyShackleford

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    Drywall done, but before cabinets/countertops/sinks were installed, and all dust cleaned up I think.
    I guess it's possible that some construction debris got washed down there that I can't recall right now.
     
  18. May 15, 2018 #18

    CT18

    CT18

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    Sometimes drywall and tile guys like to rinse out tools and buckets into drains.
     

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