- If you're looking to dump black and gray water or refill on freshwater, Kalona Iowa RV Rentals offers a convenient dumping station option.- The station provides a hose for flushing tanks, as well as a trash bin for waste disposal.- Other dump stations near Kalona include the Pilot Travel Center in Coralville, about 30 minutes away.- You'll also find dump stations at the Hills Access Station in Hills, less than 20 minutes away.- Another option is the Flying J Travel Center in Davenport, which is around an hour's drive from Kalona.