(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 15 of 18

Thread: kitchen plumbing problems

Hybrid View

  1. #1

    Default kitchen plumbing problems

    Maybe someone can help me figure out a new way to drain the kitchen sink.
    I have installed a new kitchen sink along with a garbage disposal. I am having problems with the drainage system. The drain is horizontal and is at a higher level than the discharge drain to the garbage disposal. Basically it is like I am draining up hill. Any ideas??? Thanks

  2. #2
    Plumber plumber1's Avatar
    Join Date
    Aug 2005
    Location
    Florida
    Posts
    1,423

    Default drain

    how much too high are you?

  3. #3

    Default drain

    I am 2-3 inches high.

  4. #4
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,202
    Blog Entries
    1

    Default

    That's pretty common with new deeper sinks.

    You will need to get behind the cabinets and redrill in a lower trap arm.


  5. #5

    Default

    How about a different desposal, Do they make one that is possibly shorter or a higher discharge port.

  6. #6
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,655

    Default drain

    They make tinier disposers, but probably not that much difference. We would have to see your installation before we could decide which of several possibilities might work for you.

  7. #7

    Default

    Quote Originally Posted by Terry
    That's pretty common with new deeper sinks.

    You will need to get behind the cabinets and redrill in a lower trap arm.

    Terry,
    In your diagram it shows the air gap fitting above the sink top. I remember these from back in the 1950s and 60s. The one we have now is inside the cabinet just below the rim of the sink. Should it be higher than "something"?? Could it be lower than the trap?? Why is it shown so high?? Water??

    Thanks, Tom

  8. #8
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,202
    Blog Entries
    1

    Default

    In some parts of the country, they want an "air gap" between the waste line of some fixtures.

    I food prep sink will have a drain going into a floor sink with a gap between.
    That way no waste can siphon back up.

    It's the same with dishwashers.
    the gap is there, above the flood level of the kitchen sink in this case, to prevent waste from backing up into the dishwasher.

    Ever since I say the History Channel feature on plumbing, the story where 25% of Chicago died from sickness as the result of bad plumbing, I've been a little more stern about these matters.

  9. #9

    Default Air gap and sink depth

    My kitchen sink worked fine before. Recently, I had a new, deeper sink installed (10" deep; also bigger in length and width), with a new disposal, and got rid of the air gap. Now, when I pour a pot of water in the sink, it drains down very slowly. If I turn on the disposal, the water goes right down. Will an air gap help drainage by allowing the air in the disposal to escape to somewhere? Is the bigger/deeper sink somehow causing this problem?

    Thanks,
    Steve

  10. #10
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,202
    Blog Entries
    1

    Default

    The dishwasher air gap will not help the sink drain.

    It for backflow.

    If you have a deep sink, you may need to lower the trap arm at the wall.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •