Thanks to all who responded to my query.  Probably the "best" fix is
brazing the pin hole.  Not having the equipment and time (I'm in the
middle of extracting and need it NOW!), I went the epoxy route.  Epoxy
puddy, workable for 5 minutes, set in 10, final cure in an hour, and I
was back in business.  So far, so good.  I don't know how it'll make out
long term, but for now it's sufficient.  Perhaps I'll fix it properly in
the off-season.  Nah, I'll forget about it until the next time it's a
problem!  I was reminded to make sure to empty the canister when not in
use; that sitting water is probably what did it in.  Guilty as charged.

Aaron Morris - thinking out of sight, out of mind!

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