First off, welcome to iRV2!
Second, you should add a "signature" to your profile. It contains whatever info you want; most people put info about their coach there, so they don't have to type it into each message. Instructions for adding a signature are here
On the black tank flush: Both the brochure (link here
) and the manual (link here
, page 07-6) refer to a black tank flush system being installed on the 2009 Southwinds. You should be able to tell this by looking for the inlet in the wet bay black panel. For an example, see this picture, for a 2006 Southwind 32VS:
If I have misinterpreted what model 2009 Fleetwood you have, never mind!