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Needle Valves



I have the needle valve that Dr. Foster & Smith sell 
(http://www.drsfostersmith.com/product/prod_Display.cfm?siteid=6&pCatId=4598), 
but it's not very good frankly. First, the hose barb is a tad small so 
that if I turn my CO2 pressure above 5 psi it blows off the tube. I lost 
a whole tank of CO2 while I wasn't home one day because of this. Second, 
the control is nowhere near fine. The different between 1 bubble every 
two seconds, and 2 bubbles per second is less than ~10 of turn. It is 
impossible to precisely adjust CO2 with this thing. Is there a better 
needle valve out there for a good price?

-- 
Jerry Baker