Do Home Inspectors Check Sewer Lines

Do Home Inspectors Check Sewer Lines

Do Home Inspectors Check Sewer Lines?

A home inspection is a crucial step in the home-buying process, providing valuable insights into the property’s condition. One common question is whether home inspectors check sewer lines, and the answer is typically no, but here’s a comprehensive analysis.

Standard Scope of Home Inspections

Home inspections generally focus on readily accessible and visible components of the home, including:

  • Roof
  • Exterior
  • Structure
  • Electrical system
  • HVAC system
  • Plumbing fixtures and appliances
  • Insulation and ventilation
  • Interior finishes

Sewer lines are typically buried underground and not readily accessible during a standard home inspection.

Factors Influencing Inspection Scope

However, certain factors may prompt inspectors to investigate sewer lines further, such as:

  • Visible signs of problems: If the inspector notices leaks, backups, or other issues with plumbing fixtures or appliances, they may recommend further evaluation.
  • Age and condition of the house: Older homes or those with known plumbing issues may warrant a more thorough inspection.
  • Specific buyer requests: Buyers may request additional inspections, including sewer line inspections, for peace of mind or insurance purposes.

Additional Considerations

  • Video camera inspection: If the inspector recommends further evaluation, they may use a video camera to inspect the sewer lines. This provides a detailed view of the interior of the lines, identifying any blockages, cracks, or other issues.
  • Smoke testing: Another technique is smoke testing, where smoke is pumped into the sewer lines to detect leaks or other problems.
  • Cost: Additional inspections, such as video camera inspections, may incur additional charges.

Importance of Sewer Line Inspections

While not typically included in standard home inspections, sewer line inspections are highly recommended for certain situations. A poorly functioning sewer line can lead to:

  • Plumbing issues (e.g., backups, leaks)
  • Health hazards (e.g., contaminated water, sewer gas)
  • Property damage (e.g., flooding)
  • Expensive repairs

Table: Factors Influencing Sewer Line Inspection

Visible plumbing problemsFurther evaluation (e.g., video camera inspection)
Older homesMore thorough inspection
Buyer requestsAdditional inspections may be necessary
Age of sewer linesInspect lines that are over 20 years old
Type of sewer linesCast iron lines are more prone to corrosion and cracking
Location of sewer linesUnderground lines are more challenging to inspect

Interesting Facts about Sewer Lines

  • The average lifespan of a sewer line is 20-50 years.
  • Tree roots are a common cause of sewer line damage.
  • Sewer gas contains harmful gases such as methane and hydrogen sulfide.
  • Regular maintenance and cleaning can extend the life of sewer lines.
  • A video camera inspection can reveal issues that a physical inspection may miss.


  1. What if my home inspector doesn’t check sewer lines?

    • You can request an additional inspection from a licensed plumber or sewer line specialist.
  2. How often should I inspect my sewer lines?

    • Every 2-3 years for preventative maintenance, or more frequently if you notice plumbing issues.
  3. What are the signs of a damaged sewer line?

    • Plumbing backups, foul odors, wet spots in the yard, and slow drainage.
  4. Can I inspect my sewer lines myself?

    • It’s not recommended without specialized equipment and training.
  5. What should I do if I find a problem with my sewer lines?

    • Contact a licensed plumber immediately to assess and repair the issue.
  6. What is the average cost of a sewer line repair?

    • Varies based on the type of repair and location, but typically ranges from $1,000 to $5,000.
  7. Can I prevent sewer line problems?

    • Avoid pouring grease or food down the drains, use drain covers, and have your sewer lines inspected regularly.
  8. What is a sewer line easement?

    • A legal agreement that gives a municipality or utility company access to the sewer lines on your property for maintenance and repairs.
  9. What is a sewer backflow preventer?

    • A device that prevents sewage from flowing back into your home.
  10. Can sewer line problems affect my insurance?

    • Homeowners insurance typically covers damages caused by sewer line problems, but it’s important to check your policy for specific exclusions.


While sewer lines are not routinely inspected during home inspections, they play a critical role in a home’s plumbing system. Home inspectors may recommend further evaluation in certain situations, and buyers can request additional inspections for peace of mind. Understanding the importance of sewer lines and potential problems can help homeowners make informed decisions about maintaining their properties and protecting their investments.

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