[VAC] Weeping pressure relief valve?

["Rick Langer" <farreach@xxxxxxxxxxx>]

The valve is located on the city water inlet line just past a bell shaped
valve which I think is the pressure regulator. As I look down at it, i see a
black washer like disc with a small hole in the center. Under this is a
threaded insert with a slot accross the top and can be turned with a
screwdriver. This is where the water is coming out. Should this be closed
off with a cap? To add to my confussion, there is a foot long piece of
tubing coming out of the side of the valve body, pointing straight up.
Can anyone help me here? Where's the water suppose to be released (tube or
top of valve)? What should I do, ie. service the valve, repalce it or
eliminate it? Where can I get a replacement?
Thanks a bunch,
Rick langer
'66 GlobeTrotter
#3847,VAC,TCT