What is the minimum center-to-center spacing required for an 18" chamber system?

The minimum center-to-center spacing required for an 18" chamber system is 9 feet. This specification is based on guidelines aimed at ensuring adequate separation between chambers for effective treatment and functionality of the septic system. Proper spacing is crucial for preventing interference with the system's operation, allowing for sufficient aeration and drainage, which helps maintain the efficacy of wastewater treatment.

Spacing also minimizes the risk of overloading the system, helping to prevent issues such as clogs and uneven settling that can affect the longevity and performance of the septic installation. By adhering to this guideline, installers can ensure a compliant and effective wastewater management system, ultimately contributing to public health and environmental safety.

Understanding the reasons behind these spacing requirements is essential for septic system design, helping installers to create systems that operate efficiently within Illinois regulations.