In Jay613's helpful answer to this question, Jay writes:

Don't forget the dishwasher drain hose needs to make a loop up high between the sink and the wall before coming back down to join the new disposal.

Currently, that hose, pictured going to the broken garbage disposal below, is just a short straight rubber hose.

Photo 1 with dishwasher hose leading to garbage disposal Photo 2 with dishwasher hose leading to garbage disposal

Does that hose need to be replaced with a longer hose so a loop can be made? If so, would that be a vertical loop or horizontal one? Also, what is the function of such a loop? If it's supposed to be oriented vertically, it seems like it will act similarly to a P-trap and will always hold some waste. Is that okay with a rubber hose?

If it is relevant, that dishwasher does have an air gap.

As an aside, you can see what appears to be either discoloration of the hose or some sort of coating. Is the color variation an indication that the hose requires replacement? I think the hose is probably about 10-15 years old.

  • @jay613 Since I'm quoting you, I figure it's respectful to ping you to let you know! :) Jun 16, 2021 at 4:12
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    that dishwasher does have an air gap. That is actually the function of a dishwasher high loop. If you actually have a functioning air gap then the rubber hose is not directly from the dishwasher, but goes up to the air gap - if so, you are all set. Upload a picture showing the other end of the hose, air gap, etc. Jun 16, 2021 at 4:23
  • @manassehkatz-Moving2Codidact Thanks for your interest. I requested more photos and just received them. I'll go through them and upload the best one right away. Jun 16, 2021 at 5:16
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    @RockPaperLz-MaskitorCasket Just FYI, notifications only work for people that have commented on a post or edited it (plus a few more special cases). Attempts to ping other people are simply ignored by SE.
    – TooTea
    Jun 16, 2021 at 6:54
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    Glad I could help. I'm very curious... The rubber hose is connected to some sort of fitting that is also connected to the ribbed hose that, I presume, comes from the dishwasher. Can you get a pic of that fitting? The fact that the dishwasher drain hose goes up above where it later drains into the disposal is your "loop" or trap in this hose, I've just never known of a fitting like that that appears to be more acute than a 90° angle.
    – FreeMan
    Jun 16, 2021 at 14:30

1 Answer 1


You appear to have an "Air Gap" above the counter which the hose is coming from. That is the code approved "better than a loop" method for diswasher drains. You're fine.

  • Thank you. Upvoted. If no one disagrees within a few days, please don't hesitate to remind me to accept your answer. Jun 16, 2021 at 12:10

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