Quick trap prime line question

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by grahamW, Jun 14, 2012.

  1. grahamW

    grahamW New Member

    Messages:
    30
    Location:
    Ontario, Canada
    I'm running a primer line from my laundry sink to a p-trap in my basement floor slab and I have a quick question: Is there a preferred placement for this line and should I run a 2nd (backup?) line in case one is damaged? I assume I can just place it in with the concrete but I thought I would check.

    Thanks!

    1644.jpg
    Last edited: Jun 14, 2012
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,537
    Location:
    Cave Creek, Arizona
    In that case, why not install 3 or 4 in case the second one is damaged also. There is NO REASON why the first one should be damaged, in the first place. How, or where, are you getting the water to feed the trap primer?
  3. Terry

    Terry Administrator Staff Member

    Messages:
    14,943
    Location:
    Bothell, Washington
    The fitting we use for the trap primer place the pipe down farther from the top of the slab.
    We don't wind up pouring the pipe in the concrete, but below the concrete in the dirt. It's a nice looking drawing, but not real accurate.
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,537
    Location:
    Cave Creek, Arizona
    IF you use a floor drain with a trap primer tap, it will be in the concrete floor.
  5. toolaholic

    toolaholic General Contractor Carpenter

    Messages:
    874
    Location:
    Marin Co. Ca.
    In s.f. We do a lot of these

    Every old house has a floor drain in the garage. So on major remodels We have to add a trap primer. All in copper. We buy a new tapped trap .
    It's all cast iron in the city. ditch the plastic tube,bad idea !
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