Jeff did read that somewhere and is correct.  These valves do not have any packing and may have an O-ring as someone found but the valves are made to work leak free fully opened or fully closed.  In-between they may leak.  It is not like a water valve.

On Nov 24, 2013, at 12:00 AM, Automatic digest processor <LISTSERV@GERRY.VANAGON.COM> wrote:

> Did I read somewhere that it's only designed to properly seal when fully =
> on or off?

Cheers,    

Frank Condelli
Almonte, Ontario, Canada
'87 VW Westy, '00 Kawasaki 250 Sherpa, "98 Ducati 750 Monster & Lionel Trains (Collection for sale)
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