[rundlc]

   

I think this is my air assist valve, I have not seen this operate yet. To be honest I'm not sure if it works at all. I found a waste master remote control but after putting in a new battery it didn't seem to operate anything. So if this valve opens I can use as the gray water bypass?

I noticed at the very top there is a "u" shaoed pipe in line but it seems weird to me. Sorry for being such a dunce but I'm not grabbing this idea. I was thinking that the air assist helped the drain pipe to extend and retract. This happens when you purchase a used rig and the p.o. is not able to explain how things work.