You might find this helpful.....
http://www.lincolnsofdistinction.org/vbulletin/showthread.php?t=26941
A picture is worth 1000 words.
You might find this helpful.....
http://www.lincolnsofdistinction.org/vbulletin/showthread.php?t=26941
is it stuck in the hose somewhere? my shop-vac is one of the little ones. stuff gets caught in there all the time.