What condition must be satisfied for automatic pool covers?

For automatic pool covers, it is essential that they are tested for strength and durability to ensure safety and reliability. These covers are subject to various stresses, including environmental factors such as wind, rain, and snow, as well as the weight of individuals who may inadvertently sit or walk on them. Testing these covers ensures they meet the required safety standards and can withstand regular use over time without compromising their structural integrity.

While other characteristics, such as being lightweight, electric-powered, or made from a specific material like vinyl, can contribute to the performance and ease of use of an automatic pool cover, they are not universally required conditions. The focus on strength and durability testing underscores the importance of safety and compliance with industry standards, making it the primary condition that must be satisfied for automatic pool covers.