IPC Code: Main line and Venting size

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by construct30, Dec 5, 2007.

  1. construct30

    construct30 New Member

    Joined:
    Jun 16, 2007
    Location:
    NorthWest PA
    In a one floor house and then a two floor house, according to IPC code, is it correct to split the main drain a four inch PVC, say to two different parts of the house using two 3" lines, Then run multiple line through the roof as long as they have the same or more combined area of the 4" pvc. OR do you have to keep one of the lines four inch all the way through the roof. I've done both and passed inspection, but most books show keeping a main line through the house with a main stack vent the same as the main line. Any ideas on what is correct and why?
     
Similar Threads: Code Main
Forum Title Date
Plumbing Forum, Professional & DIY Advice main shut off valve code requirement Nov 5, 2009
Plumbing Forum, Professional & DIY Advice Main Sanitary Stack Code Question Dec 15, 2007
Plumbing Forum, Professional & DIY Advice UPC code queries Mar 8, 2015
Plumbing Forum, Professional & DIY Advice Shower Valves, Diverters, Code, USA Jan 20, 2015
Plumbing Forum, Professional & DIY Advice help understanding code - drains Dec 27, 2014

Share This Page