How can roots enter collection systems?

Roots can enter collection systems primarily through pipe cracks. When there are small fractures or gaps in the sewer pipe, they create an entry point for roots searching for moisture and nutrients. These cracks can occur due to shifting soil, temperature changes, or aging infrastructure, making the surrounding moisture available to plants. Once roots penetrate the cracks, they can grow inside the pipe, potentially leading to blockages or even damage to the sewer system.

The other options may involve potential weaknesses or access points in the collection system, but they do not present the same direct connection for roots. For instance, while pipe joints can be areas of weakness, they are typically designed to minimize infiltration. Manhole covers serve as access points for maintenance but are not a direct route for root intrusion like cracks are. Connecting sewer lines may have their own structural vulnerabilities, but again, they are less susceptible to root intrusion than the cracks in the pipe itself. Understanding these pathways is crucial for effective maintenance and management of collection systems.