I'm going to get lambasted for this... the very fine screen in the gascolator will prevent small particles from entering fuel lines to the carburetors. The large volume in the gascolator, compared to the small ID fuel line, allows the flow to slow down and particulates to settle out.
OP has only five posts so perhaps airplane is in early flight stage. That being the case, it may take a few tanks of fuel to flush debris leftover from building process.
SNIP
Very true. I found little bits of aluminum for probably my first 30 hours or so. And I must have cleaned those tanks 100 times before bolting them to the wings. I guess in-flight agitation of the tanks and a bit of time with them full of fuel knocked loose those slivers of Al.Exactly.
New tanks need to be flushed, I don’t care how tidy you were making them. Sump as needed to get a clear sample. ...
The airport that we hangar at installed a new fuel tank a couple of weeks ago. My son, who has a Cherokee 6, also gets fuel at the same airport. I’ll ask him if he’s seeing any of this.
If he doesn’t then I’ll need to explore the other suggestions for sure.
Thank you
I hate to be a stick in the mud---but is this a new/recent build, or an older 12 recently purchased?
Just asking--
Tom