Re: Aquatic Plants Digest V3 #935

[conwayte <conwayte at enter_net>]

>There may be a simple adjustment you can make on your needle valve. There is
>an article on The Krib describing this problem on Nupro valves. This may also
>apply to ARO valves as well. Go to 
>www.thekrib.com/Plants/CO2/solenoid.html#9.
>Here you will find an article written by Steven T. Dixon that explains in
>detail how to check if your needle valve is out of adjustment.
True needle valves like the Nupro are not designed for tight shut off, 
but as a throttling valve.
It the ARO valve is a true needle valve (the part of the valve that moves 
in and out of the seat looks like a needle), then it is probably not a 
tight shut off design either.

Tim

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