Can you place a flexible cap over a cleanout

Discussion in 'Drain Cleaning' started by Bob from accounting, Mar 1, 2021.

  1. Bob from accounting

    Bob from accounting Member

    Joined:
    Mar 5, 2020
    Location:
    California
    I am replacing my 4" clean out flush plug with something that will loosely go over the top instead. Like a flexible cap.
    However, I am not sure if a 4" Fernco flexible cap with a hose clamp will just fit over the top as the outside diameter of the end of the clean out has those ridges that creating a larger outer diameter?
    Here is a link to a 4" clean out that looks similar to what we have installed and poking out of the ground:
    https://www.homedepot.com/p/NIBCO-4...MERCH=REC-_-searchViewed-_-NA-_-205840065-_-N

    Here is a link to a 4" cap that I want to place over top, just not sure it will fit?
    https://www.homedepot.com/p/Fernco-4-in-Plastic-DWV-Flexible-Cap-PQC-104/100372305?NCNI-5

    Ideally I need something that can sit on top and be a bit loose so if there is a back up the cap will be pushed away and the back flow will come out of the clean out. They make $25 devices that screw in but this could work for 4$ too?

    Can a 4" flexible cap sit over a 4" clean out? Again check out how thick the outside diameter of the end of the clean out as shown in the link.

    Before I buy these just wanted to see if anyone could give me some advise if they have done this?

    Thanks!
     
  2. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    I am not addressing what is permitted, or even it the concept is a good idea.

    The rubber cap you pointed to, as far as I can tell, is made to go over the end of a 4 inch pipe, which is 4.5 inches OD. Your fitting in the yard may be considerably larger.
     
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  4. breplum

    breplum Member

    Joined:
    Oct 2, 2004
    Occupation:
    Plumbing and heating contractor
    Location:
    San Francisco Bay Area
    We use rubber 4" caps all the time to serve as loose-enough outdoor caps. We remove the hose clamp to make sure some numbskull doesn't come along to tighten the hose clamp.
    A 4" cap is designed to go over pipe so won't work w/ your existing fitting.
    Just buy the expensive screw in pop off if you want the simplest solution.
     
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  5. Bob from accounting

    Bob from accounting Member

    Joined:
    Mar 5, 2020
    Location:
    California
    I might first ask a few questions along the way before doing it the easy way.
    4$ caps x 10 clean outs $40
    27$ pop offs x 10 clean outs = $270

    Easy comes with a price right. Figure I would do a little homework first, see if someone has experience with this scenario.
    Thanks
     
  6. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Ten cleanouts??
     
  7. Bob from accounting

    Bob from accounting Member

    Joined:
    Mar 5, 2020
    Location:
    California
    Well 54 clean outs at the complex. but they will not be the same sizes so 10 is a nice round number for what I need. Is that helpful or were you just saying "10 clean outs?" like that is a lot for one house, no really knowing this is for a complex. All good. Just looking for help, but happy to clarify anything if it helps.
     
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  8. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    That's it. However for a complex, there is an an increased chance of children lifting the caps, and dropping stuff in.
     
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  9. Bob from accounting

    Bob from accounting Member

    Joined:
    Mar 5, 2020
    Location:
    California
    good point
     
    MASTERPLUMB777 likes this.
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