Trap Primer constantly running

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by GLM, Mar 3, 2010.

  1. GLM

    GLM New Member

    Messages:
    2
    Location:
    Utah
    I have several floor drains with trap primers connected. They seem to have a constant flow and have recently started spitting out enough water into the trap to make them gurgle from the splash. Why might this be? I have previously had very high water bills, but could never find a leak and suspected the sprinklers, but now I think it's these floor drains. Why would they need to have such continuous flow? Is there anything to adjust? I don't even know where they would be connected and hope it doesn't involve tearing up concrete floors.

    GLM:confused:
  2. johnjh2o1

    johnjh2o1 Plumbing Contractor for 49 years

    Messages:
    1,143
    Location:
    South*East
    Last edited by a moderator: Mar 4, 2014
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,301
    Location:
    Cave Creek, Arizona
    "inline" trap primers have a rubber washer seal, which WILL deteriorate and allow constant flow. The best repair for these is replacement, although you may have to find one exactly the same size to fit in the pipe run. "Side arm" ones seldom fail by constantly running. They usually fail by NOT running at all. They also require replacement, but usually any similar one will work.
  4. GLM

    GLM New Member

    Messages:
    2
    Location:
    Utah
    I cannot locate any attachments or branches from any of the fixtures in the bathroom or the sink in the adjoining room. Could the source be inside a wall or perhaps the attic space where they branch to the drains? There are 4 drains within a 10 foot diameter across two rooms. They all have a steady trickle, with occasional, but random spurts. The various drains to not all spurt at the same time or interval. Would this suggest that they have separate connections?
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,301
    Location:
    Cave Creek, Arizona
    Normally they would each have individual primers, but there could be two on each primer if the installer piped them properly. They will usually be attached to the line going to a sink, and also usually in the wall with an access door. If they did not install the door, then you have to do some detective work and hope you can find them without making excess holes in the wall.
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