How to determine width of downstem?

Discussion in 'Bongs, Dab Rigs, Bubblers, Water Pipes' started by MccCaptured, Feb 11, 2014.

  1. I'm looking into getting a pre-cooler of some kind, but I'm uncertain of what size my downstem is. A penny fit perfectly into the opening, if that's any help. I'm just not sure how to determine the size of it.
  2. #2 DorianOmega, Feb 11, 2014
    Last edited: Feb 11, 2014
    there are 2 mainstream sizes of downstem diameter for pipes; 14MM and 18mm, less common is 9mm.
    Most precoolers are attached to GoG systems, do you have a Glass on glass pipe?
    Also pics would help or a description of how the downstem is set up.
  3. Yeah I do.

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