Totally agree with John, if there's even one 90 degree bend in the drain line that device is next to useless at rinsing with any pressure.
After 40+ years rving I learned early on don't spend too much time, worry or money on the tank sensors, they'll never be much more than pretty little red lights telling you absolutely nothing of any use.
Use factory flush, dump a few gallons of water with a good squirt of Dawn before traveling, use plenty of water per flush & NEVER EVER leave the black valve open when connected to a sewer dump.
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Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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