[Colyn was right, the model should have been included... better yet, the subject of this thread should have been "IVP cabin pressure dump valve".  Since I posted the original message for Andre this is my bad.  Sorry... fixed now.  <M>   ]

> -----Original Message-----
>From: Colyn Case  
> Sent: Feb 7, 2014 8:35 AM
> To: Lancair Mailing List  
> Subject: [LML] Re: FW: Dump valve  
>
> Andre,
>
>
> It's always useful to include the model you are talking about in the subject
>line.  I assume you are talking about the IV-P.
>
>
> You definitely won't hear anything as a result of the dump switch itself.
> That is only controlling a small valve to enable the vacuum to move the
>larger  valve.  Possibly if you hook up the vacuum you can hear it move but
>I've never heard it.   Visual check or rely on your VOM at the valve?
>
>
> Colyn
>
>
>
> On Feb 7, 2014, at 8:28 AM, <marv@lancair.net> <marv@lancair.net> wrote:
>
>
>
>
> Posted for Andre Todd [Andre@aerotronics.com]
>
>
>
> Is there any indication that the manual cabin pressure dump switch is
> operating the valve under the rear seat with just power on with the aircraft
> on the ground? Can you feel or hear the valve cycle when the manual dump
> switch is activated?
>
> Thank you!
> Andre
>
>
>
>
>
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