Whats typical hose size for a Disposal vent?


My air vent is overflowing water when running the dishwasher. I can tell the hose that runs from the Disposal to the vent is clogged (so dishwasher water overflows out of it).

I have a plumber coming in a few days, but want to buy supplies for him to have ready. I just dont know what that hose size is without removing it (which is very difficult)

  10 answers
  • GrandmasHouseDIY GrandmasHouseDIY on Jun 30, 2020

    Hi there, the standard dishwasher drain hose is 5/8" but it does depend on your brand of dishwasher etc. I would sure think a plumber would come with typical supplies like that especially if he knows that's what your problem is. Mine is held on with a pipe clamp right above the sink trap that I can unscrew and clean out if needed.

  • Tom Stuart Tom Stuart on Jun 30, 2020

    Any plumber will have a truck full of common supplies and parts. That might not be where the clog is. Just relax and he will take care of it.

  • William William on Jun 30, 2020

    The plumber will have the parts. It may be the air vent that needs to be replaced or cleaned.

  • Cheryl A Cheryl A on Jun 30, 2020

    the plumber usually knows and has the hoses, pipes etc needed for this type of repair

  • Redcatcec Redcatcec on Jul 01, 2020

    Plumbers come prepared for the specific job they are to do, he will investigate based on the symptoms of the dishwasher. It is his job to be prepared with routine items for his trade.

  • Your plumber will have all the supplies needed on hand, or if it's specialty, he or she can run out and get it. It's best to let them take care of it.

  • Deb K Deb K on Jul 02, 2020

    Hello AidenGrano, hope this helps you out, Most dishwasher drain hoses are 1/2 inch in size. To allow for different types of connections at the end of the hose, dishwasher drain hoses are fitted with a special rubber boot. This allows them to connect to 1/2-inch, 3/4-inch and 1-inch connections.

  • Chas' Crazy Creations Chas' Crazy Creations on Jul 03, 2020

    When this happened to me it we had to have the pipe drilled out by Roto Rooter and everything worked great again.

  • Ken Erickson Ken Erickson on Jul 04, 2020

    I had a problem where the dishwasher gave me an error signal because of the drain hose being plugged. I just connected the dishwasher drain hose directly to the garbage disposal and abandoned the air vent in place. I had a super quiet Bosch dishwasher and was annoyed when it ran and noise came out the air vent. Now it is quiet. I have always connected dishwashers directly to the garbage disposal in the past.