Here is a snip of a post from the rv-list. While this info is from my 6A, I did the same thing on my 8. Here is a pic
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I have had my static ports clog twice in heavy rain(you know the bucket
type) in my 6A. ARGH! Not fun. I think the rain puts a little rain drop
just inside the port, both sides, and those drops just sit there and
mess with your static system. It's a terrible thing to have happen in a
plane that loves to whiz bang through altitude. The VSI is an important
gage for me in the soup. Bad things happen when it starts sending you
through altitudes for the wrong reasons. It was one of my worst times in
hard IFR. Anyway, enough rant on that...
Answer:
I went into my box of R/C stuff and retrieved a fuel line bulkhead
fitting. Little plastic bugger. You can buy one from tower hobbies. Part
number LXG851
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXG851&P=7 .
I put this tiny bulkhead fitting in my panel, teed off static line
behind the panel. On the front side of the panel, where the bulkhead is
attached, I have a short piece of r/c fuel line, 1/4 inch long maybe
with a plug in it.
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXG848&P=7 part number
lxg48.
When my static ports clog, I just pull the fuel line with the plug stuck
in it right off the panel and let the static vent to cabin. Simple
Install, quick emergency procedure, and very effective.
I spent nothing cause I had this stuff laying around, but you can do it
for less than 10$, and have enough stuff for 2 planes.
Oh and as a side note, when you pull this plug in flight, WHOAA, does
the static and altimeter go bazerko until it settles back down. Takes
maybe 10 seconds. The pressure difference between out and in is
substantial.
Also as another note: For those that don't know, Altrak Alt. hold
suppliments in pitch stability reference with static source. With altrak
alt hold engaged, I can pull the plug off, vent static to cabin, watch
the alt. and VSI go whacky, and the altrak holds steady. A tribute to
its realibility on its gryo as primary and static as a backup.
Hope this was helpful