Sewer Line Repair

Updated November 6, 2026

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Safety

Keep people and pets away from standing wastewater, which can carry bacteria. Never open a sealed cleanout cap while water is actively backing up, and never enter a trench or crawl space where a sewer line may have collapsed. If sewage reaches living areas, stop water use in the building and avoid contact with contaminated surfaces. If a strong rotten-egg odor is present indoors, leave the building and contact the gas utility before any plumbing work begins.

Before the visit

Before calling, note which fixtures drain slowly, when the problem started, and whether backups appear at the lowest drains first. Locate the cleanout access if it is visible and clear the area around it. Gather any prior inspection reports, camera footage, or records of past repairs. Prepare a list of questions, and confirm whether the property owner or the municipality is responsible for the section of line in question.

Repair vs replace

Repair is often appropriate when damage is limited to one section of pipe, such as a single root intrusion, a cracked fitting, or a localized sag that can be corrected. Camera inspection findings showing isolated defects, a line that is otherwise structurally sound, and property features that allow targeted access all favor repair over replacement.

When to replace

Replacement is typically considered when the line shows widespread deterioration, multiple breaks, extensive root invasion along most of its length, collapsed sections, or outdated materials such as deteriorated clay or Orangeburg pipe. Repeated repairs within a short period, or a camera inspection showing loss of grade throughout the run, also point toward full replacement.

Common issues

Symptom	Likely causes	Safe check	Stop when
Multiple fixtures draining slowly at the same time	A blockage or partial collapse in the main sewer line rather than an individual branch drain; grease buildup, root intrusion, or a sagged section of pipe.	Run water at several fixtures and note whether they slow down together; a whole-house pattern points to the main line, while one slow fixture typically points to a branch clog.	Stop running water and call for help if drains slow further while a washing machine or tub drains, or if water rises in a tub or floor drain.
Sewage backing up into tubs, showers, or floor drains	A main line blockage from roots, flushed items, grease, or a collapsed or offset pipe section.	Check whether the backup appears at the lowest fixtures first and note the color and amount of water; keep children and pets away from the area.	Stop all water use immediately if raw sewage appears, and avoid contact with contaminated surfaces until the line is cleared.
Gurgling noises from toilets or drains	Trapped air forced through the system by a partial blockage or a blocked vent connected to the main line.	Flush each toilet once and listen for gurgling at nearby tubs or sinks; a single flush test will not overflow a partially blocked line.	Stop flushing if water rises toward the rim or if gurgling is followed by a backup.
Persistent sewer odor inside the home or in the yard	A cracked or broken pipe leaking under the slab or in the yard, a dried-out trap, or a damaged cleanout cap.	Look for a visible cleanout cap and check whether it is loose or cracked; run water in unused fixtures to refill dried traps.	Leave the building and contact the gas utility if the smell is strong and resembles rotten eggs indoors, since natural gas can be mistaken for sewer gas.
Unusually lush, green patches or soggy spots in the yard	Wastewater leaking from a cracked or separated pipe joint, fertilizing the soil above the leak.	Compare the suspicious area with the rest of the yard during dry weather and note whether the spot stays damp or grows faster; walk carefully to avoid stepping into soft ground.	Keep off the area and request an inspection if the ground feels spongy, sinks, or develops an odor.
Recurring clogs that return within days of clearing	Root regrowth inside the pipe, a misaligned joint that snags debris, or progressive pipe deterioration.	Track how often clogs return and which fixtures are involved; a repeating pattern at the main line suggests a structural problem rather than a one-time blockage.	Stop using chemical drain cleaners repeatedly, since they can damage older pipe material and rarely fix a main line defect.
Foundation cracks, settling, or slab movement near the sewer path	Long-term leakage under or near the foundation washing away supporting soil.	Photograph any new cracks and note whether doors or windows have started sticking; do not dig or probe near the foundation.	Contact a professional promptly if cracks widen, floors slope, or damp spots appear along interior walls.