[MaxwellD]

Thanks everyone - the other sinks all fill and drain fine. The grey tank is wide open. The black tank is closed. Plunger may have helped a little - whatever it is it clogged the drain pretty good. I dont think Copenhagen would do that. Letting a little Drano work on it for a few min. We’ll see. I can see a P trap from the belly so if a Hepa thing is supposed to replace that, then I dont think I have one of those.