What Is an Overhead Sewer, and Why Illinois Homes

Home plumbing terminology can be confusing, especially when homeowners start comparing “overhead” drainage options. An overhead sewer (often described as an overhead drain or above-ground drainage system) is designed so waste and wastewater piping travels through a home’s upper areas or along accessible interior/exterior routes rather than being buried underground from the start.

For Illinois homeowners—particularly those in older homes—plumbing upgrades are frequently driven by concerns about reliability. Many properties face aging drain infrastructure, intermittent backups, water intrusion in basements, and the high cost and disruption of excavating yards or reworking buried lines.