Just got my san icon in a new Seneca. Apprehensive at first use, but it woks like a dream. I have four tanks on my 38rb. Two black, two white. Couldn't be easier to use. Unscrew the protective cap, insert in waste drain, open black valve. Turn on macerated. I then turn on black flush. Then open black number 2 (pun intended), and black flush that one. I never turn off the macerator. Then proceed to grey 1, then grey two. I keep the b
Ack flush running for a few minutes, switching between tanks.
You can hear and see when tanks are empty. Pump motor humming changes. And the pulsing of the hose stops.