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  • Double Washing Machines on 2" pipe?

    http://farm3.static.flickr.com/2587/...2a55b410_o.jpg

    I'm putting in two back to back washers for my basement laundry room and in-law sweet bath as shown in picture.

    I have an existing 2" drain coming out of concrete floor, everything else is planned.

    I plan to put a clean out near floor followed by a double wye, or possibly 2 stacked single wyes. Above the wye(s) will be a 2" vent to basement ceiling vented to side of house.

    My question:

    (1)
    Will the 2" drain line be capable of draining 2 washers as shown in picture?
    • The books i've seen list the fixture unit FU of a washer at 2 (it was 3 in another book), with a total of 4-6 for the 2 washers.
    • Additionally, the given maximum FU of a verticle 2" pipe is listed as 10 and the max FU of a horizontal 2" pipe is 6.
    • The vertical 2" pipe coming out of floor quickly changes to a vertical 3" pipe just below the slab by way of a 3/2 bushing. From there the 3" pipe drops another foot into a 3" 90 and short horizontal run to the 4" main drain.
    • There is never a horizontal 2" segment of pipe carrying double capacity.
    it is all planned at the moment. Don't tell me to tear up concrete
    Attached Files

  • #2
    Re: Double Washing Machines on 2" pipe?

    No license or permit?...then no problem.
    Should work. Go with 2 wyes instead of dbl. wye.
    Increase drain riser to washer to at least 30".
    May have a problem if both discharge at same time.
    Or not.

    Comment


    • #3
      Re: Double Washing Machines on 2" pipe?

      So given a vertical 2" pipe coming out of the slab... This would be the best solution, other than breaking up the concrete slab and changing to a 3" pipe (which an inspecter would recommend)?

      Comment


      • #4
        Re: Double Washing Machines on 2" pipe?

        You say it goes to 3" just below the slab on the vertical?
        Shouldn't be a problem.

        Comment


        • #5
          Re: Double Washing Machines on 2" pipe?

          I wouldn't put both on a 2" vertical. That's back to back with pumping action.

          And no WYE's legal here off the trap arm. Right? IPC?

          J.C.

          Comment


          • #6
            Re: Double Washing Machines on 2" pipe?

            Aw, c'mon. Where's your sense of adventure.

            No license, no permit, no problem.

            Comment


            • #7
              Re: Double Washing Machines on 2" pipe?

              here is what is below the slab. So JC you think I need to tear out the concrete and expend the 2x4 wall to allow for the 3" pipe?

              If the two washers can't drain on a vertical 2 inch, that is a better situation than a flooded living area.

              will the vert drop of a wye affect the vent in IPC? So you think i need to bring the 3 inch up thru the slab and have stacked 3x2 sanitary Tees to each washer?
              Attached Files

              Comment


              • #8
                Re: Double Washing Machines on 2" pipe?

                The Fla. Code, Sec. 406.3 states:
                "The automatic clothes washer fixture drain shall
                connect to a branch drain or drainage stack a
                minimum of 3" in diameter."
                Which yours does, eventually.
                Your area may be different.
                The inspector rules.

                Comment


                • #9
                  Re: Double Washing Machines on 2" pipe?

                  Three inch trapasaurus megasus.

                  Comment


                  • #10
                    Re: Double Washing Machines on 2" pipe?

                    Originally posted by drtyhands View Post
                    Three inch trapasaurus megasus.
                    Hahahaha, "trapasaurus megasus". I got a kick out of that.

                    Comment

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