Trap Primer Type

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by DIYorBust, Jun 17, 2019.

  1. DIYorBust

    DIYorBust Member

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    Mar 5, 2019
    Location:
    Long Island, New York
    Installing some new floor drains and expecting a trap primer will be required by code. There is a lav near one, and slop sink near the other. I was thinking it would be better to use an ASSE 1044 tail piece on the sink drains to prime the floor traps, and this is accepted by code. That would avoid the need for primer valves on the potable supply, and save water too. But could there be an issue with clogging, especially on the slop sink? Any advice would be appreciated. Thanks!

    Edit: Based on the first reply, I think my question may be unclear. I'm evaluating whether it might be a good idea to use a gravity trap primer from the lav or slop instead of a primer valve off the potable supply, and both are approved here and would be plumbed into the drain as per code.

    DoB
     
    Last edited: Jun 17, 2019
  2. OLD TIMER

    OLD TIMER Member

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    FLORIDA
    Trap primer.
     
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  4. DIYorBust

    DIYorBust Member

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    An ASSE 1044 tailpiece is a trap primer, and it's approved by local code. Are you saying you would not use this kind of trap primer?

    Edit: We agree there is a need for a trap primer. I'm curious whether I might want to use an ASSE 1044 gravity type primer vs using an ASSE 1018 trap primer valve. Both are code approved, although there may be a distance constraint with the 1044, and if anyone knows what that is I'd appreciate it. The advantage would be no concerns with valve failure using the 1044, and no wasted fresh water, since the trap would be primed with grey water from the lav or sink. Thanks for your response.
     
    Last edited: Jun 17, 2019
  5. hj

    hj Moderator & Master Plumber Staff Member

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    I am not sure how you would use the slop sink drain to provide trap priming, but the lavatory tailpiece will work.
     
  6. DIYorBust

    DIYorBust Member

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    Thanks for your reply. Forgive my ignorance, but why would the tailpiece not work on the slop sink as well?
     
  7. OLD TIMER

    OLD TIMER Member

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    I thought that too. But I think he's refering to a laundry sink on legs. A mop sink won't work. If it's in a residence than by all means use a tail piece trap primer.
     
  8. DIYorBust

    DIYorBust Member

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    Yes, it will be a laundry sink on legs, not a mop sink. My concern is, will lint from laundry water eventually clog the priming line to the floor drain? It doesn't sound like these are that common so I'm not sure what to expect.
     
  9. OLD TIMER

    OLD TIMER Member

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    I find them in old buildings. Heck yea lint will clog a 1/2'" line.
    think about it.
     
  10. DIYorBust

    DIYorBust Member

    Joined:
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    Location:
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    Yeah it sounds like a problem. What do you think about using a 1 inch line from the laundry sink to the drain? Or perhaps the laundry sink could drain indirect into the floor drain, I don't know if that is code compliant here though, would probably complicate the inspection at the very least.
     
  11. OLD TIMER

    OLD TIMER Member

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    May 18, 2019
    Location:
    FLORIDA
    p-traps come with 1/2" female connections, draining on the floor is messy. I think if I got a trap primer clogged with lint I would
    try to wash it out with high pressure water. If you did clog that line and couldn't clear it, it's gonna cost you more than a trap primer.
    one trap primer can service more than one trap. I'm not trying to talk you out of anything, just giving you things that I would be
    think about myself.
     

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  12. DIYorBust

    DIYorBust Member

    Joined:
    Mar 5, 2019
    Location:
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    Thanks folks. It occurs to me that the primer is mainly an inspection/compliance issue since the traps will likely receive priming from the boiler neutralizer and moping the floors etc. Strainer is a good idea. I'll update this post when I decide which direction to go. Thanks!
     
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