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Thread: How do main drains work?

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  1. #1
    Join Date
    Apr 2006
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    395

    Default Re: How do main drains work?

    Just close the valve about half-way and see what happens. Then slowly close it more until you can determine which is which.

  2. #2
    abessellieu is offline ** No working email address ** abessellieu 0
    Join Date
    Jul 2006
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    Bryn Mawr, PA
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    12

    Default Re: How do main drains work?

    Yup - that did it! I now know which is which. It probably seems silly, but I was afraid to touch anything. Thanks so much. Now on to posting my chemical questions....

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