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dcam 11-01-2009 07:36 PM

Leaky air valve on furnace Leaky furnace valve
I'll try this without pictures, since they all seem to be too big to post.

I have this leaky valve on my furnace, It's brass, cylindrical, about the size of a pill bottle, and has a knurled cap on the top that you can loosen and tighten. The valve is not in-line with any piping, but sticks out to one side near the pump. The valve leaks, it seems like this or another similar valve has leaked in the past, not too bad, a few drips every few minutes, but enough to be a bother. Is this something I can adjust, or does it need to be replaced?
i have a gold valve sitting on top of the airscoop over the expansion tank on my furnace, it is leaking at a pretty good clip. i bought a new one, and need some advice on the install. do i have to drain the furnace before removing the old valve?

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