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  1. #14
    that sounds like a riser to help clean primary drain.

  2. #15
    Join Date
    Jun 2007
    Logansport, IN
    I feel like there should be a running trap before the clean out tee. The trap would prevent air from coming out of the tee. I have worked with guys who have told me that the drain would not work with out the tee open to let air in. However I dont agree, use a running trap then a vent tee with a taller stand pipe.

  3. #16
    Join Date
    Dec 2004
    Columbia South Carolina

    for get those running traps

    Please do not install running traps, I end up changing them out on every service/maintenance. Ever notice how rusted and damp the blower side of the air handler is, P-trap is the way to go. Here in the south, a good 80% of the air handlers are in the attic, damn sure don't want water comming thru the ceiling. Float switch is a must also

  4. #17
    I work on high end computing systems, so excuse my ignorance when it comes to optimal A/C installations. Could someone explain the P-Trap and where it should be installed? You guys have been a great help.

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