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Old June 18th, 2009, 07:50 AM
bradedup's Avatar
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Hookah Master
Join Date: Jun 2008
Location: Madison, WI
Posts: 3,258
Default Re: Question about my Hookah

What BigE said, it is a purge valve for clearing harsh or stale smoke. I ve never heard about clearing it every 3rd or 4th pull to clear CO tho.
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