The answer to 'how often to drainage system' is that most drainage systems should be inspected and maintained at least once per year. Proper maintenance helps ensure the system continues to function effectively and prevents costly issues like flooding or water damage. This typically involves clearing debris from drains, checking for clogs or blockages, and ensuring the system is directing water away from the home's foundation.
Some homeowners may need to inspect and maintain their drainage system more frequently, especially if they live in an area with heavy rainfall or have a lot of trees and shrubs on their property. Signs that a drainage system needs attention include standing water, wet spots in the yard, or water pooling around the home's foundation.