Hi. If you do a search for Grey Water Transfer System, I posted pictures of how I cured my 3605.
I don't disagree with other posters there about just letting it equalize. That really comes down to your needs and how you operate. For me, I needed a way to equalize while traveling (truck stop) and no ability to dump at that moment. Or on a long weekend with just electric, I don't have to pack up and go dump twice (for just this 1 grey tank).
Doug & Tiffany
2016 F-350 Platinum DRW
2010 Harley Davidson FLHTK (Ultra Limited)
2015 Voltage 3605