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Aqua Lab Technologies

14/18mm Replacement Downstems

Best Seller
Best Seller
17 reviews

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 joint fitting: 18mm
  • Slide joint fitting: 14mm
  • Borosilicate glass
  • 6-slit, open-end diffusion tip
  • Available in different lengths 
  • Made in the USA

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 17 Reviews
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Aaron D.
United States United States

works perfect, great price.

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!

David B.
United States United States
Replacement downstream

Product perfect shipping was fast great company

Gabriel C.
United States United States
10/10 down stem

This down stem made me rethink every life choice I made relevant to this purchase! Why didn’t I use Aqualab YEARS ago?! WHY DIDNT I SAVE COUNTLESS GAS ON TRIPS TO LOCAL SMOKE SHOPS ON DOWN STEMS THAT JUST BROKE EASILY?! WHHHHHHYYYYY!....Thankfully Aqualab saved me from anymore having to think, now when I need something I’m going to them and if you read this I hope you’ve already added this to your cart. If not, then lord have mercy on your soul.

Andrew G.
United States United States
Make sure to measure

Welp, I tried eye balling the dimensions and didn’t work out for me. However this is quality glass, would/will need to buy again!