Homeownership in Denver comes with its fair share of responsibilities, and maintaining your sewer system is one of the most important—yet often overlooked—tasks. While most of your plumbing system is visible and accessible, your sewer line quietly runs underground, channeling waste and water away from your home. But like anything else, it doesn’t last forever. Knowing the average sewer line lifespan and understanding when to repair or replace it can save you thousands of dollars—and a major headache.
Understanding Sewer Line Lifespan
The average sewer line lifespan depends on several factors, including the material it’s made of, soil conditions, tree root interference, and maintenance. In Denver, many homes have aging infrastructure, and sewer lines installed decades ago may already be near the end of their functional life.
Here’s a quick breakdown of common materials and how long they typically last:
- Clay pipes: 50–60 years (common in older Denver homes)
- Cast iron pipes: 75–100 years
- PVC pipes: 100+ years (if installed properly and well maintained)
- Orangeburg (bituminized fiber): 30–50 years (often fails prematurely)
Keep in mind that these are general estimates. A sewer line may fail earlier due to root intrusion, ground shifting, corrosion, or poor installation.
Signs Your Sewer Line Is in Trouble
How do you know your sewer line is at the end of its lifespan—or at least in need of attention? Watch for these common warning signs:
- Frequent drain clogs or backups
- Sewage smells around your home or yard
- Lush patches of grass or soggy areas in your yard
- Gurgling sounds from drains or toilets
- Slow drains throughout the house
If you notice any of these issues, don’t wait. A quick camera inspection from our team at Sewer Lines Only can help diagnose the condition of your line and guide the next steps.
When to Repair a Sewer Line
In many cases, it’s possible to repair a sewer line rather than replace the entire system. Repairs are typically more cost-effective and less invasive, especially when the problem is localized. Here are scenarios where repairing makes the most sense:
1. Minor Cracks or Leaks
Small cracks that haven’t yet spread or caused widespread damage may be patched or sealed using trenchless methods like cured-in-place pipe (CIPP) lining.
2. Isolated Tree Root Infiltration
If roots have entered the line in one spot but haven’t compromised the pipe structure entirely, a spot repair might be all that’s needed.
3. Relatively New Line
If your sewer line is only 10–20 years old and made from a durable material like PVC, repairing may extend its life without the cost of full replacement.
4. Limited Damage Area
When the damage is isolated to a small section—say 5–10 feet—it may be cheaper and more efficient to repair only that portion.
At Sewer Lines Only, we use advanced diagnostic tools and trenchless repair techniques to minimize disruption and get your system back in working order fast.
When to Replace a Sewer Line
Sometimes, the best (and only) option is to replace the sewer line. While it’s a larger investment upfront, replacing an old, failing line can save you money and stress in the long run. Here’s when replacement is the right call:
1. End of Sewer Line Lifespan
If your line is approaching or beyond its expected lifespan—especially if it’s made of clay or Orangeburg—it’s usually better to replace rather than risk ongoing failures.
2. Recurring Problems
If you’re experiencing regular backups or have needed multiple repairs within a few years, replacement can offer a permanent solution.
3. Widespread Damage or Collapse
When camera inspections show large sections of collapsed or severely damaged pipe, spot repairs won’t suffice.
4. Severe Root Intrusion
If tree roots have invaded multiple areas or caused significant structural damage, removing and replacing the pipe may be the only reliable fix.
5. Poor Slope or Installation
Some older sewer lines in Denver were improperly installed and lack the proper slope for effective drainage. In such cases, replacement is necessary to correct the grade and prevent ongoing issues.
Trenchless vs. Traditional Sewer Line Replacement
If you’re facing replacement, you might wonder whether traditional excavation or trenchless methods are better. Trenchless technology has made it possible to replace sewer lines with minimal disruption to your yard or driveway.
At Sewer Lines Only, we offer trenchless pipe bursting and pipe lining services whenever possible. These methods are:
- Faster: Many jobs can be done in a day
- Less disruptive: No need to dig up your entire yard
- Durable: New pipes often exceed the lifespan of the original
However, not all situations are suitable for trenchless replacement. If your line is severely collapsed or lacks structural integrity, open trench replacement may be required.
Cost Considerations: Repair vs. Replace
While costs vary depending on the situation, here’s a general idea of what you can expect:
Repair sewer line : $1,000–$5,000 (depending on location, depth, and method)
Replace sewer line : $5,000–$15,000 (trenchless or traditional)
We understand that this is a major expense for any homeowner. That’s why Sewer Lines Only provides free estimates and transparent pricing, so you can make the best decision for your home and budget.
Preventive Measures to Extend Your Sewer Line Lifespan
Want to avoid premature repairs or replacement? Here are a few things you can do:
- Avoid flushing wipes, grease, or non-biodegradable materials
- Schedule regular sewer inspections (especially for older homes)
- Install root barriers if tree roots are a recurring problem
- Use water-saving fixtures to reduce strain on your system
We also recommend a video inspection every 2–3 years if your home is more than 30 years old.
Trust Denver’s Sewer Line Experts
At Sewer Lines Only, we’ve built our reputation on honesty, quality work, and unmatched expertise. We specialize in diagnosing sewer line issues and helping homeowners in the Denver area decide whether to repair or replace. Our team is fully licensed, insured, and ready to guide you through every step of the process.
Your sewer line won’t last forever—but with the right team, it doesn’t have to be a disaster. Let us help you protect your home, your yard, and your peace of mind.
Schedule your sewer line inspection today. Call Sewer Lines Only—Denver’s trusted choice for sewer repair and replacement.
