14/18mm Replacement Downstems


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Aqua Lab Technologies replacement downstems fit most standard glass bongs, bubblers, and water pipes requiring a 14/18mm fitting. The 14/18mm replacement downstems feature quality boro glass and 6 diffusion slits for added airflow and classic water diffusion. Glass replacement downstems are handblown in California for Aqua Lab from quality, American borosilicate glass.

Downstem Features:

  • 14/18mm diffused downstem
  • Bong Downstems
  • Bong joint fitting: 18mm
  • Slide joint fitting: 14mm
  • Borosilicate glass
  • 6-slit, open-end diffusion tip
  • Available in different lengths
  • Made in California, U.S.A.

NOTE: All downstems are measured from the top of the ground joint to the end of the diffusion tip. Please see our diagram in the listing for complete downstem measuring instructions.

Added June 20, 2018

Customer Reviews
4.8 Based on 20 Reviews
5 ?
90% 
18
4 ?
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3 ?
10% 
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Filter Reviews:
NG
10/26/2021
nancy g.
United States United States
replacement downstem

great replacement item. perfect fit.

JP
06/19/2021
jason p.
United States United States
good for price

cheaper but good bang for the price

BR
05/03/2021
Britany R.
United States United States
Great quality!

Impressive! The recs online said I would be and truly I was. Ended up being the wrong piece I needed though now I just... have it lol :(

AD
08/03/2020
Aaron D.
United States United States
Great!

works perfect, great price.

BH
07/09/2020
Brian H.
United States United States
4 inch

I loved the downstem on my piece, it made it hit just as good as the original one but the only reason I give it a 3 is because it has already broken after normal usage in only a week or so, I haven’t dropped it or anything I was just taking my nail out like I always do to clean my piece and it sure enough the glass cracked, with that being said it sure does hit well!