What are the common causes of a sewer line backup?

The most common causes of a sewer line backup are tree root intrusion, grease and sludge buildup, mineral scale, and damaged or collapsed pipes. Roots often find tiny openings and expand inside the pipe, while daily fats, oils, and soap residue harden into thick blockages; over time, scale narrows the pipe and any weak section can fail. A quick video camera inspection pinpoints the exact problem, and cleaning methods like hydro jetting remove stubborn buildup; if the pipe is broken, spot repair, trenchless relining, or full replacement may be needed. Our technicians see these patterns frequently throughout the Erie area. If sewage is entering fixtures or floor drains, treat it as urgent and stop running water.

Look for these telltales:

• Gurgling drains after flushing: likely a main-line restriction
• Repeated clogs across multiple fixtures: buildup or roots downstream
• Foul odors from floor drains: trapped waste in the main line
• Wet or sunken yard spots: possible pipe break allowing soil intrusion

Turn off water use and avoid chemical drain cleaners until a licensed plumber inspects the line. <br/> Updated: 2026-04-03 <br/> Need help in Erie, CO? Call (720) 577-4266 or book online. From the initial call to the completed repair, their team was professional, punctual, and respectful. — Kelly W.