The ride was originally scheduled to open on May 23, when the water park’s season began. T he next scheduled opening on June 5 was postponed, and a June 29 date was also delayed.
Park officials have said the delays were needed to allow for more testing.
Guinness World Records in April certified the 17-storey, 168ft-tall attraction as the tallest water slide in the world.
Riders on the Verruckt, which means “insane” in German, plummet at 60mph to 70mph on four-person rafts.