Sorry guys, appreciate the replies but that's not the way it is...
There is a standard "hose clamp" around the flange at the end of the tank. The black PVC slipped up in there about an inch, and there is no evidence of glue on the pipe. Same set up on gray and black tanks (different diameters of course).
Camper is a 15 YO Fleetwood Terry. The true bad thing is that it's 27 ft but has the axle over the springs...very little clearance for the drains at the far rear...
AND for the record, this set up has been water tight for 15 years...
