Everyday materials
What builds up inside a sewer line
Many blockages start with materials that seem harmless. Grease and cooking oil harden inside pipes, soap residue and mineral deposits coat the walls, and hair and other organic debris catch on that buildup.
Paper products other than toilet paper, and wipes, are another common cause. Over time these materials narrow the opening until wastewater cannot pass freely, and the first sign is often a drain that slows rather than stops.
