wing fuel drain valve leak

Crush washers worked fine. No leaks.

I believe he is correct, a crush washer on each side.

The wing fuel drain valve has a slow leak
that appears to be coming from the fuel line
banjo fitting. My A&P believes there should
be a crush washer on each side of the banjo
fitting. Neither the Ercoupe Service nor Parts
manuals show or list a drain valve assy.
Before repairing the leak, my A&P needs to
find out if there is supposed to be any gaskets
or washers associated with the banjo fitting.
Anyone?
-Bruce.