What's this vacuum line?

[rhock99@epix.net (Ryan H)]

So what would happen if I broke the nipple for the vacuum line off the black box in the firewall?   Would my heat or AC malfunction?  Or both?  Of course, I also snapped it off at the intake manifold, too (I'm good like that), so I don't know if it's repairable... 

Hmmm, how does one repair a broken off vacuum line?  Should I just use a smaller plastic connector-piece thingy (like a vacuum T, only two sided)?
> 
> From: John Erickson <ranahan@charter.net>
> Date: 2002/12/31 Tue PM 02:50:02 EST
> To: Ryan H <rhock99@epix.net>, scirocco-l@scirocco.org
> Subject: Re: What's this vacuum line?
> 
> Yes, its the vacuum for the HVAC controls.  The connection on the "black 
> box" is just a pass through.  Inside it goes to the vacuum distributor 
> which is controlled by the top HVAC control lever.  The line that runs to 
> the passenger fender goes to a vacuum reservoir.  You should also have a 
> small circular check valve between the "T" fitting and the intake manifold.
> 
> John
> 
> At 02:18 PM 12/31/2002 -0500, Ryan H wrote:
> >On my 16V: It runs from behind the firewall, connected to the big black 
> >box on the passenger side firewall 'tray' (HVAC controls?).  It goes to 
> >the passenger side wheel-well by the power steering reservoir.  It has a 
> >T-fitting in-between, and the T'd line goes to a hose right off the back 
> >of the intake manifold.
> >If you need a picture, I have one I can upload.
> >Thanks.
> >
> >
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> 
>