And what does it do?
I have a 2016 Kodiak. Back towards the dump valves for the holding tanks there is another rod that sticks out that moves in and out. It looks like it goes up into the underside of the floor towards the toilet or maybe the shower? Have no idea what it does.
Sure looks like a dump valve to me!
Longer travel valve is black tank and other(s) are grey tank(s). My 330rls has 2 grey tanks. Mine came with Grey handle on black tank, go figure!