Re: Valve Source

[Wright Huntley <jwwiii at pacbell_net>]

Air pumps usually have a felt filter o/e to keep dust particles from 
messing up the flap valves and downstream stuff, like needle valves and 
airstones. It should be emphasized that any water flow-through system 
needs a water filter, good for particulates down to about 5 microns, for 
much the same reasons.

Ball valves, in plastic, still are to be preferred for water, because 
metal can/will corrode, eventually, and clog up. The aperture of a ball 
valve seems a wee bit less likely to get clogged than a needle valve. IDK 
why. Plastic needle valves are not practical. One good tightening on 
"turn-off" is usually all it takes to ruin them.

Wright

Barry Cooper wrote:
> I think our comments were in response to a question from John Alegre 
> about building a flow through system for fry, and what valves to use for 
> distributing the water.
>
> Barry
>
> At 10:22 AM 7/18/2003 -0700, you wrote:
>
> > Both of the comments below are very useful, BUT Sandy's original 
> > question was regarding an "air system", which I take to mean a way of 
> > distributing "air" to a number of tanks, and not water.  And for that, 
> > Jehmco's AV1B have worked flawlessly in my system.  That being said, 
> > I'll save both of the comments below for whenever I need a water 
> > distribution system.
> >
> > Alberto
> > AKA 08000
> > San Diego
> >
> >
> >
> > At 7:44 AM -0700 7/18/03, Barry Cooper wrote:
> >
> > > I recommend the AWV1TB valve as listed on the Jehmco site. They are a 
> > > ball valve. I would avoid metal valves in a water distribution system 
> > > and I would avoid needle valves. The latter tend to block up too 
> > > quickly and require frequent adjustment.
> > >
> > > Barry
> > >
> > > At 02:48 PM 7/17/2003 -0400, you wrote:
> > >
> > > > In a message dated 7/17/03 2:18:30 PM, listhub at andante_mn.org writes:
> > > >
> > > > <<
> > > > Is there a better valve choice for this?
> > > >  >>
> > > >
> > > > My current valve of choice is no valve at all but a controlled drip 
> > > > emitter -
> > > > 1 gph, for example. I just use the threaded barb connector at the 
> > > > PVC tubing.
> > > > Easier to get equitable distribution and cheaper. See 
> > > > www.dripirrigation.com
> > > >
> > > > Lee Harper
> > > > Media, PA
> > > > USA
> > > > ---------------
> > > > See http://www.aka.org/pages/killietalk/subkillietalk.html to 
> > > > unsubscribe
> > > > Join the AKA at http://www.aka.org/pages/join.html

--
Wright Huntley -- 760 872-3995 -- Rt. 001 Box K36, Bishop CA 93514




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