OP: when you say "nothing happens," do you mean you're not seeing or hearing anything? I know with mine, the only way I know it's working is that I can hear a slight hissing sound from the plumbing in the bathroom, and when I open the drain for the black tank, water is coming out. You're telling us that no water is coming out of your drain when you have the flush on?
2015 XLR Hyperlite 30HFS5 (mods being performed regularly)
2009 Salem LA 292fkds (gone)
Nights- ('12)23 ('13)23 ('14)15 ('15)31 ('16)25
2014 Harley Davidson FLHX (XLR cargo)
2014 VW Jetta TDI (diesel sipper, camping support vehicle)
2011 Ram 2500 CC 4X4 CTD, B&W Companion (toy hauler hauler)