Re: vacuum pump

• To: tesla-at-pupman-dot-com
• Subject: Re: vacuum pump
• From: Hollmike-at-aol-dot-com (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Thu, 25 Mar 1999 20:44:33 -0700
• Approved: twf-at-verinet-dot-com

In a message dated 3/25/99 2:48:16 AM Mountain Standard Time, tesla-at-pupman-dot-com
writes:

> 
>  When this thread started, I tried my water bed aspirator with a vacuum
guage.
>  
>  I only got to 15 inches of vacuum and it had a nasty habit of injecting 
> water
>  down the vacuum line.  Maybe mine was bad, but one should be cautious about
>  these cheap devices.  they are definitly far short of the fancy lab grade
>  devices...
>  
>          Terry
  One should always use a water trap in line when using an aspirator to
prevent the water from being sucked into the system when the water is turned
off.  I would also put a pinch clamp on the hose between the water trap and
the vessel under vacuum prior to turning the water off.
Mike

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