Carnival Twister waterslides that run into a pool (Fantasy class and Holiday class; except Carnival Imagination & Inspiration) have a height requirement of 48” or 4 feet. This height is set by the manufacturer. It is set for the safety of the guest using the equipment.

Carnival's Twister waterslides that run off into itself (Destiny, Spirit and Conquest class vessels) have a height requirement of 42’ as they do not have a pool at the bottom to worry about. This will now include the Imagination and Inspiration due to Carnival Waterworks.