Bends in foot vent

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by sazerac, Nov 10, 2019.

  1. sazerac

    sazerac New Member

    Joined:
    May 29, 2019
    Location:
    San Diego
    Hi All,

    I'm running the foot vent for my kitchen island and I have my 1/4" slope going to the vertical section of vent, but I have a need to add two 1/8 bends under the slab, basically so I can avoid notching too much out of my footing. So the foot vent goes from a 1/4 slope to a 1/1 slope ("vertical") back to a 1/4 slope and then finally up to the roof. I wanted to confirm whether this is allowed or not. I didn't see anything in the CPC/UPC prohibiting this for island venting, but maybe it's prohibited by a more general rule.

    I also wanted to checked if it's okay to use street fittings for the loop portion of the vent. I have a 45-90-45 all street, so minimal gluing.

    Thanks!
     
  2. James Henry

    James Henry In the Trades

    Joined:
    Jul 23, 2019
    Occupation:
    Plumber
    Location:
    Billings, Montana.
    If I'm understanding correctly, you want to go from horizontal to vertical back to horizontal. That wont work. Your foot vent will hold water.
     

    Attached Files:

  3. Sponsor

    Sponsor Paid Advertisement

     

    Attached Files:

  4. sazerac

    sazerac New Member

    Joined:
    May 29, 2019
    Location:
    San Diego
    Thanks for the reply.

    I attached a drawing. Where the foot vent comes off the combo under the slab I have a 1/4 grade. I want to go to 1/1 for a short run, then back to 1/4 before hitting the 90 in the wall. Doing is this way requires me to do less notching on the footing. I want to avoid compromising the footing too much since it's carrying the roof load. My inspector won't allow AAVs as you have in the image you attached. Thanks again!
     

    Attached Files:

  5. James Henry

    James Henry In the Trades

    Joined:
    Jul 23, 2019
    Occupation:
    Plumber
    Location:
    Billings, Montana.
    That's fine like that, I misunderstood.
     
Similar Threads: Bends foot
Forum Title Date
Plumbing Forum, Professional & DIY Advice Bends in the primary boiler loop vs the secondary May 27, 2019
Plumbing Forum, Professional & DIY Advice Too many bends in 3" sewer pipe? Sep 29, 2018
Plumbing Forum, Professional & DIY Advice How many bends can be in a tub drain? Aug 17, 2018
Plumbing Forum, Professional & DIY Advice Trap arms and bends before you need a cleanout. Jul 12, 2018
Plumbing Forum, Professional & DIY Advice Are 2 Quarter (90) Bends Allowed In Horizontal Drain Line? Apr 29, 2017

Share This Page