Here's something most homeowners don't want to think about: according to the U.S. Environmental Protection Agency (EPA), the average American home's plumbing loses nearly 10,000 gallons of water per year due to leaks and a big chunk of that happens underground, where you can't see it. If you've been putting off looking into Professional sewer repair in Woodland Hills, you might already be sitting on a problem that's getting worse by the day. The scary part? Most homeowners remain unaware of their damaged sewer line until they encounter a flooded basement or a backyard that resembles a porta-potty. Let's fix that right now.

So, What Exactly Is a Damaged Sewer Line?

Think of your sewer line like the main drain pipe under your house. It carries all the waste from your toilets, sinks, showers, and washing machines out to the city sewer or septic tank. When that pipe gets cracked, clogged, or collapses, everything backs up. And trust us, you don't want that.

Sewer line damage can happen slowly over years or suddenly after a bad storm or a tree root invasion. The pipe is underground, so you can't just look at it to see if it's broken. You have to read the signs your house is giving you.

That's precisely what this guide is for.

Why Do Sewer Lines Get Damaged in the First Place?

Before we jump into the symptoms, it's worth knowing why this happens. Understanding the cause helps you catch it earlier — and prevents it from happening again.

The most common causes of sewer line damage include:

1. Tree root intrusion — roots naturally grow toward moisture and can crack pipes over time

2. Aging pipes — older homes with clay or cast iron pipes are especially vulnerable

3. Ground shifting or settling — especially in areas with expansive soil

4. Grease buildup from years of kitchen use

5. Flushing items that don't belong down a toilet (wipes, paper towels, etc.)

6. Corrosion from chemical drain cleaners used repeatedly

According to the American Society of Civil Engineers (ASCE), much of America's underground sewer infrastructure is over 40–50 years old, meaning millions of homes are sitting on pipes that are well past their prime.

6 Symptoms of a Damaged Sewer Line Most Homeowners Miss

These aren't just random plumbing quirks. Each of these symptoms signals a potential problem in your house. Here's what to look for:

1: Slow Drains That Just Won't Quit

Why does this keep happening even after I use drain cleaner?

You've tried the liquid drain cleaner. You've used the plunger. Maybe you even bought one of those plastic drain snake tools from the hardware store. But the water in your shower or sink still drains like it's thinking about it.

One slow drain usually means a local clog like hair or soap scum. But when multiple drains in your home are slow at the same time, that's a sewer line red flag. It means the blockage is deeper in the system, past where any store-bought product can reach.

Think of it like a highway traffic jam. If one lane is blocked, a few cars slow down. But if the main freeway is clogged, everything backs up across the board.

2: Sewage Backups and Gurgling Noises

Is gurgling in my pipes something to worry about?

Yes and here's why. When your sewer line is damaged or blocked, air gets trapped in the pipes. That air has to go somewhere, and it pushes back up through your drains, creating that unsettling gurgling sound.

If you notice sewage backing up into your bathtub, toilet, or floor drain especially when you use another fixture, that's not just gross it's a plumbing emergency. Raw sewage contains bacteria and pathogens that are a real health hazard.

Centers for Disease Control and Prevention (CDC), exposure to sewage can cause serious illnesses including hepatitis A, E. coli infections, and leptospirosis.

Gurgling vs. Normal Pipe Sounds How to Tell the Difference:

3: Foul Odors Coming From Drains or Your Yard

Why does my yard smell like sewage even though nothing is backed up?

This one is sneaky because homeowners often blame it on something else a dead animal, a neighbor's garbage, or just 'outside smells.'But if you keep getting a whiff of rotten eggs or raw sewage near your yard, foundation, or floor drains, the source might be underground.

A properly functioning sewer line is airtight. If it's cracked or broken, sewage gases including hydrogen sulfide (H₂S) escape into the surrounding soil and eventually into your home or yard. That rotten egg smell? That's H₂S, and it's not just unpleasant in high concentrations, it can be dangerous.

If the smell is stronger near your basement or crawl space, that's especially concerning because it could indicate a break close to the foundation.

4: Unusually Lush or Soggy Patches in Your Yard

Could a broken sewer line be why part of my lawn is greener than the rest?

This is the one symptom that actually looks good until you know what's causing it. If you notice a random patch of grass that's noticeably greener, thicker, or growing faster than the rest of your lawn, it could mean sewage is leaking below that area.

Sewage acts as fertilizer. When a sewer line cracks underground, the leaked waste feeds the grass above it. So while the lawn looks healthy, what's underneath is the opposite of healthy.

Similarly, soggy or wet patches in your yard that don't dry out even days after rain can signal a leaking sewer line. If you step on a soft, squishy spot in your yard that wasn't there before, don't ignore it.

5: Foundation Cracks, Sinkholes, or Settling

Can a broken sewer line actually damage my home's foundation?

Yes and this is where it gets serious. A leaking sewer line saturates the soil around your foundation. Over time, that soil erodes and can no longer support the weight of your home. The result? This can lead to cracks in walls, uneven floors, and in severe cases, sinkholes in the yard.

This doesn't happen overnight, but it's a slow, progressive problem that gets more expensive with every month you delay. Foundation repairs can cost anywhere from 

$5,000 to $100,000+ depending on severity. A sewer camera inspection, by comparison, typically costs $150 to $300 a very small price to catch the problem early.

Cost of Acting Now vs. Waiting — A Real-World Comparison:

6: Pest Infestations Especially Rats and Cockroaches

What does a pest problem have to do with my sewer line?

This one surprises most people. Rats and cockroaches are experts at squeezing through tiny cracks. And a cracked sewer line underground is basically an open invitation. They enter through the pipe and work their way up into your home's drains.

According to the 

National Pest Management Association (NPMA), rats can fit through a crack as small as ¾ of an inch which is well within the size of most sewer line cracks.

If you're suddenly dealing with a rodent or roach problem that seems to come from inside the walls or drains, don't just call an exterminator. Have a plumber check your sewer line too. Killing the pests without fixing the entry point is like bailing a sinking boat without plugging the hole.

What Should You Do If You Notice These Symptoms?

Here's a simple action plan if you spot one or more of these warning signs:

1. Don't panic — but don't ignore it either. One symptom might be a minor issue. Multiple symptoms together usually mean a sewer line problem.

2. Document what you're seeing. Take photos of slow drains, wet spots in the yard, or any cracks. This helps your plumber understand the scope.

3. Call a licensed plumber for a sewer camera inspection. This is the only way to see exactly what's happening inside your pipe without digging.

4. Ask about trenchless repair options. Modern sewer repair doesn't always mean digging up your whole yard. Ask about pipe lining and pipe bursting techniques.

5. Get a written estimate before any work begins. A trustworthy plumber will give you a clear scope of work and cost breakdown.

Trenchless vs. Traditional Sewer Repair Which One's Right for You?

Ten years ago, sewer line repair meant a crew showing up with a backhoe and tearing up your driveway and landscaping. Today, there are better options.

Don't Wait Until It's a Disaster

Sewer problems are one of those things that start small and quietly, a slow drain here, a weird smell there and then one day they're a full-blown emergency. By the time most homeowners realize something is seriously wrong, the damage has already spread to the foundation, the yard, or the inside of their home.

The good news? Every single symptom on this list is catchable early if you know what to look for. And now you do.

At Express Plumbing and Rooter, we've seen what happens when homeowners wait too long. We've also seen the relief on people's faces when a simple camera inspection catches a problem before it becomes a $20,000 nightmare. Our team handles everything from basic sewer line inspections to full trenchless replacements with honest pricing and zero runaround.

If you notice even one or two of these symptoms in your home, don't wait. Contact Express Plumbing and Rooter today and let us take a look before it gets worse.

Frequently Asked Questions

How do I know if my sewer line is broken or just clogged?

A clog usually affects one drain. A broken sewer line typically causes multiple slow drains, gurgling sounds across fixtures, and sewage odors. A camera inspection is the only definitive way to know for sure.

How long does a sewer line repair take?

Minor repairs can be done in a day. Trenchless lining usually takes 1–2 days. Full sewer line replacement can take 3–5 days depending on the length of the pipe and site conditions.

Will homeowner's insurance cover sewer line repairs?

Standard homeowner's insurance usually doesn't cover sewer line damage from normal wear and aging. However, some policies cover sudden and accidental damage. Check your policy and ask your insurer if they also offer optional sewer line coverage riders.

Can I use my plumbing while waiting for a sewer repair?

It depends on the severity. For minor issues, limited use may be okay. For active sewage backups or broken pipes, your plumber will advise you to minimize use until the repair is complete to avoid making the problem worse.

What is the lifespan of a sewer line?

It depends on the material. Cast iron pipes last 75–100 years. PVC pipes can last 100+ years. Clay tile pipes (common in older homes) typically last 50–60 years and are much more prone to cracking and root intrusion.

What's the difference between pipe lining and pipe bursting?

Pipe lining (CIPP) inserts a resin-coated liner inside your existing pipe, which hardens to create a new pipe within the old one. Pipe bursting destroys the old pipe while pulling a new one through in its place. Your plumber will recommend which is best based on the condition of your existing pipe.