Personally I've given up pushing those buttons, although they are quite pretty.
I chose to dispense with the big slinky sewer hose in favor of the 'Valterra Sewer Solution' that uses a 1" waste hose and macerates the waste using available water pressure.
I dump the Black and Grey tanks every third day for the two of us and back flush the pipe and hose.
If my shower pan is slow to drain, I know it's time to dump the grey tank again.
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Biggles
2015 Toyota Tundra Dbl Cab 5.7 V8
2017 Zinger Z-1 291RL "Harvey'
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