Duckface,
I installed a Tornado as high up and to the inside on the rear of the black tank as possible. I ran the water line into the storage bay containing all the sewer lines, added an anti-suck back valve, a quick disconnect and using a "y" splitter at the campsite water source I bypass my pressure reduction valve going into the RV. This gives full water pressure into the Tornado and at sites that have high water pressure and you can hear the Tornado screaming and scrubbing away. With two rinse cycles - each using 2 oz of Dawn down the toilet - the last rinse is mostly bubbles and very clear.
Keep us posted on the dual Tornado idea, never thought of trying that.
DocMike
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Sheree & Michael NCNG LTC(ret) with Munpi, RC and Sheba (cat).
2019 Nexus Viper 27V, E-450, 5 speed "Ms. Enterprise", Infotainment Center, HUD, , Safe-T-Plus, Curt SpareTire Mount, ext. WiFi Antenna, Roadmaster Tow Sys& Invisibrake.
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