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Thread: Cleanout On Existing Vent?

  1. #1

    Default Cleanout On Existing Vent?

    I have a 4" cast iron vent on the end of a line just after the toilet. I am wanting to install a cleanout to the outside brick wall approx. 3' away. First, is it okay to do this? Second, any height requirements off the slab. Third what's the easiest way, cut a hole in the existing cast and put on a saddle or pull the cast stack out and reinstall with PVC or what. If the easiest is to cut a hole, how do I cut the hole, the sheetrock is off on one side of the wall only? Fourth, what would be the size I should use, I want to use PVC?

  2. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default co

    You cut a short section of pipe out of the vertical line. Then you insert a tee, (a cast iron tee would be the easiest one to insert), and install the lateral pipe to the outside.

  3. #3


    How would I go about cutting the existing CI since I have sheetrock on the backside? Would this new tee use those rubber donuts? How high off the slab?


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