Air pump/Brake booster line sucking closed

[deathhare]

Noticed today that one of the lines going from my air pump to the brake booster is sucking closed. I dont know if this means something is wrong with something here or its just that the hose Im using is too soft and allowing this to happen.
Its only happening to hose 2 in my pic. The others 1 and 3 are not closing up.
In the pic you can see that 2 is closed up.

Can anyone shed any light on this?
Thanks

[deathhare]

Figured as much.
Maybe I just didnt notice it doing it before. I somehow thought maybe it had just started.
Thanks 

[GEE-BEE]

You can use silicone from Aircraftspruce.com, various i.d. sizes, blue cover
 or aerospace black vacuum hose:

aeroquip 306
or
stratoflex 193

both are -50 inches for vac use

GB

[deathhare]

Thanks. I gotta have something in the next few days for the drive to SoWo.
Hopefully somewhere in this redneck city will have what I need.

[fatmobile]

Or you could put a spring inside of it.
It will turn with it but not collapse.

[deathhare]

Didnt have time to look today.
I like the spring idea.
Who sells springs that long and such a diameter?

[GTD.]

Is there no breakers yards near you? why not grab some of the propper hard plastic pipe that the car should have instead of that soft rubber crap that connects to the pump with a 50mm length of 12x3.5mm reinforced rubber hose

[deathhare]

There are yards here but they dont have VWs. They might have a couple but they wont likely have any mk1s and DEFINITELY wont have any diesel VWs. 

[Baron VonZeppelin]

Contact member Quantum TD.
He is in Tenn and probably has a box full of those hard hoses that you need. Postal would get it there pronto and cheap.

I just had one in my hand a week ago and laid it back inside the car for safe keeping because didn't need it. Pulled it out of brake booster to get the booster grommet - and the backfire valve broke in half ... oops.

Won't be back there for another week or two.
But could get it then, if you were still in need.

Quantum TD is a great reliable source.