Since I have never used the flexible hose system, I can't compare. The way I do my dumping may take a little longer anyway. I dump black water. Then I use the internal spray system to wash down the black water tank. The one gray water goes next. Another spray of the black tank. Next goes the other gray water. Finally, I turn the Sewer Solution nozzle toward the RV line to complete my wash (just a minute or two), then the nozzle goes back to the hose to force out all remaining water or whatever, close valving and unhook. I probably do more washing than necessary. So be it.
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