So about that black tank flush kit...
Frankly we have better luck not using it. Just using a hose above the toilet helps us get a much better flush than using the so called tank flush kit. We only used that for our first few trips but found we were left with an odor that only went away when we used our old method of flushing the tanks that we learned in our first class c.
None of the handles inside our water bay have anything to do with black tank flushing, only how to fill, flush lines and sanitize...
Carl & Dawn
2015 Greyhawk 31FS
2015 Ford Transit Connect (our TOAD on a DEMCO Dolly)
DW, DSx2, DDx2 Catx2 Dog
Tampa Bay Area of FL