Re: Rochester status report, Jan 2, 2002

[Chris Albertson <chrisalbertson90278@yahoo.com>]

Look at aquarium pumps.  These are AC powered
and some of them are quite good. (and some not)
Eheim, a German company, makes some of the best
pumps I've seen.  They can be run as submersible
or dry.  A pair of Eheim #1046 pumps will last for years
and if it fails there is only one moving part that is
replaceable with no tools required.  The pump can be
completely disassembled using only your fingers

http://www.eheim.com/technik_pumpen.htm

I have a medium sized sailboat and on it many pumps.
for various purposes.  I've replaced most of them
within the last year.  I'll tell you, the 12V pumps
use a lot of current for the pumpping power delivered
and so have thicker wire are less compact, more expensive.
You've got to spen $150 or $200 for a good 12V pump
that will work 100% duty cycle in a harsh enviroment for
years without failing.  Using 60Hz AC lets the rotor be
a parmenent magnent so you eliminate brushes.  The Eheim
pump has just one moving part. I which I could use AC
pumps in my boat but I am dependent on lead acid
batteries for power.

--- Andrew Bennett <andrew.bennett@ns.sympatico.ca> wrote:
> On Thu, 03 Jan 2002 18:21:39 -0600, Tom Droege 
> <tdroege@veriomail.com> wrote:
> 
> >I agree with Chris, don't try to parallel water systems.  A second
> pump 
> >might be a cheaper solution.  But then you have more heat going into
> the 
> >water if you get a submersible pump.  The CCD list has long
> discussions on 
> >pumps.  They use a 12 volt pump designed to pump bilge water.
> 
> I'll second that one. I have just had to replace
> the one I use to stir the noxious contents of my
> sprayer after about five years of corrosive and
> abrasive slurries. There wasn't much left of it
> when it finally quit but that's 4 1/2 years more
> than I hoped for when I bought it. Uses only a 
> little over 1A. Tough beast.
> 
> >  I paid a lot 
> >for the last pump I bought because I was tired of fussing with cheap
> 

=====
Chris Albertson 
  Home:   310-376-1029  chrisalbertson90278@yahoo.com
  Cell:   310-990-7550
  Office: 310-336-5189  Christopher.J.Albertson@aero.org

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