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  1. #1
    Join Date
    Sep 2003
    Posts
    86
    We are in the process of installing a 3.5 ton carrier water cooled heat pump in a ceiling.The unit is just a bit over the drop ceiling.Went to finish hooking up the drain line from the pan, and realized I dont have enough room to make a trap.We are using clear vinyl tube to provide some vibration elimanation.The drain will terminate in the basement below into an open 3" standpipe with a 1 1/2" trap on the bottom.Any thoughts are appreciated.Thanks.

  2. #2
    Join Date
    Aug 2003
    Location
    Baltimore area
    Posts
    1,818
    IMO I would think you would want a trap for the unit. The 1 1/2" in the basement MAY be good enough if your drain from the unit is air tight with the 3" pipe. If the drain in the basement deoesn't trap properly do you really want to be sucking in sewer fumes?

  3. #3
    Join Date
    Apr 2002
    Posts
    11,808
    If you can't get the trap in the ceiling space run a rigid drain to the basement, trap the condensate drain line then let it drip indirectly to the stand pipe.

    Maybe touch base with your local plumbing inspector.



    [Edited by Carnak on 08-08-2004 at 02:24 PM]
    The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.

    http://www.ductstrap.com/

  4. #4
    Join Date
    Sep 2002
    Posts
    607
    if the drain is on the negative side of the blower u will definately need a trap somewhere

  5. #5
    if ah is a pulltrough then you will have drain problems without a trap and remember tee goes after trap. trap would not do any good if tee is before trap now would it.

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