CO2 Needle Valve As Check Valve?

[Aries]

Can it be used as a check valve? Meaning H2O wont flow back into the regulator or CO2 tank in case of accident or so forth.

I have this precision needle valve from aquabotanic.com
"Precision Needle Valve -
This Needle Valve is most suitable for Aquarium use. With a 56 turns / inch and 3° tapered, it can provide down to 10 bubbles of CO2 / minute consistently (at 0 pressure). Fits most CO2 Regulator Kits on the market. Inlet - Male Threaded NPT 1/8" (measures 1/4" OD physically) / Outlet - Hose Barb 1/8" (or 4/6 mm ID/OD tubing). $18.00

I didnt think so, but I read somewhere one could. Just curious. Now my CO2 tank is level to the tank so no h2o can get in (lost my check valve somewhere in a move and never found it - odd i know).

THanks

Aries

[djlen]

Everything I've read says that needle valves do act as check valves.
Len

[Aries]

Thanks :)