have you tried a hard wire brush ?
Quote:
a little might be left behind and that will cause the connection to not be watertight and leak.
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I think Teflon tape or plumbers thread dope will seal it up.
on another note........
this thread reminded me of that old Reese's commercial.
"I got Kerdi-Fix on my stub-outs"

you got chocolate on my peanut butter!
you got peanut butter on my chocolate!