[T3] Pneumatic screen washer Helphos Valve

[Dave Hall]

I've been having some unreliability of the washer bottle pressurising valve
on my Squareback, emptying the spare overnight.  I brought it into the warm
to give it a look over, and try to understand what's what.

I assumed the valve is faulty, but working through things logically, suspect
now that it may simply be the tyre connector end.  The outer rotates on the
spigot allowing it to be tightened on the tyre valve.  The inner end of the
spigot holds the tyre valve open so it pressurises.  There must be wear on
that joint by now - maybe dirt gets in there too - so it's an obvious place
for air to leak out.

If the spigot doesn't seal properly to the outer part, the tyre will empty
even if the valve is working fine.

The higher-pressure Squareback ones (red) are very hard to find, and not
available new, and the black ones are not easy either.


It seems to have held for a couple of days now, so I'm just hoping it's just
the connector that wasn't sealing.


Dave.
UK VW Type 3&4 Club
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