RE: [APML] Vacuum Pump

[Bill Beeman <bbeeman@beemangroup.com>]

Any aquarium pump I've ever had apart used plastic or
rubber valves that would require major re-work to pull
any significant vacuum.  They are usually simple flap 
valves and are effectively on the wrong side to pull
vacuum

Perhaps some of the really old belt drive pumps could be
modified, but the modern vibrator pumps are unlikely to 
work.

Bill Beeman

-----Original Message-----
swalters@att.net wrote:
> 
> I have heard that it is possible to modify an aquarium
> pump to draw a vacuum. I would be using this with a
> vacuum film back, this is not a very demanding
> application.
> 
> Does anyone know about doing this?
> 
> I would guess there is a valve inside the pump that
> simply needs to be reversed but this might prove
> impossible on some models, in any case this is a guess
> on my part.
> 
> Any suggestions welcome.
-- 
Matt BenDaniel
http://starmatt.com

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