Sanitary sewer line blockages are typically caused by roots, grease, and improper disposal of items. Tree roots can enter the sanitary sewer system at joints and cracks in the sewer service lines and mains. Grease can solidify in the sewer lines and restrict other waste from flowing through. The lines can be blocked by items like disposable diapers, paper towels, feminine hygiene products, washing machine lint, rags or other items improperly flushed down the drain or toilet. Please refrain from flushing these items and keeping the sanitary sewer lines clear to provide you with good service without backups into your basement.