Dual sink plumbing/venting options, which is best?

Discussion in 'General Plumbing Help' started by Martin Caveza, Jul 20, 2019.

Help Support Plumbing Forums by donating:

  1. Jul 20, 2019 #1

    Martin Caveza

    Martin Caveza

    Martin Caveza

    New Member

    Joined:
    Jul 20, 2019
    Messages:
    1
    Likes Received:
    0
    Location:
    westlake village, CA
    Hi, I'm new to this forum so thanks in advance for the help!

    Our upstairs bathroom has dual sinks and one of them had a clogged drain. After several attempts to unclog it personally and through a plumber, I found out that the iron drain pipe in the wall was completely closed and thus needed to be replaced (50 years old, see photos A-1, and A-2).
    My question is this: Is there any benefit to re-plumbing the old iron pipes by using either option A or option B? Is one version better than the other? See photos.
    I've seen both options mentioned in this forum and not sure which to use. Is there a code concern? A sewer gas pressure concern? or anything else?
    Thanks for the help!

    Photo A-1.jpg Photo A-2.jpg Option A.png Option B.png
     
  2. Jul 20, 2019 #2

    Geofd

    Geofd

    Geofd

    Professional Professional

    Joined:
    Jan 20, 2018
    Messages:
    1,433
    Likes Received:
    209
    Location:
    Boston, Massachusetts
    they would both a is easier to snake individual drains but more work...b is fine as long as you have a clean out above sometimes when snaking the cable will go from one side to the other
     

Share This Page