Which statement is true about roller pumps?

Roller pumps are indeed commonly used in several applications, including agricultural, industrial, and sometimes aquatic pest control. However, they are particularly effective in low-pressure applications, which limits their utility in some contexts. While they do have specific adaptability attributes and can produce pressure, these features can vary based on design and intended use.

The statement that roller pumps are not typically used for aquatic weed control reflects a more accurate understanding of their common applications. Aquatic weed control often requires specialized equipment designed for the specific conditions and challenges presented by water environments—such as the ability to deal with debris and the need for precision in delivering herbicides or other treatments. Other types of pumps or application systems are generally preferred for these purposes because they are designed to handle the nuances involved in aquatic environments more effectively than roller pumps. Thus, this assertion captures a critical distinction in the suitable uses of roller pumps compared to other specialized equipment.