April 24, 2026
What Does a Sewer Line Do?
Your sewer line is the underground pipe that carries wastewater from every drain in your house out to the municipal sewer main or a septic tank. It runs from the foundation of your home, through your yard, and connects at the property line or beyond. Everything you flush, rinse, or drain passes through it.
Most sewer lines in Lancaster County homes are made of one of a few materials. PVC is common in anything built from the 1980s onward and can last a century or more. Clay pipes were standard before that and held up for about 50 to 60 years. Cast iron shows up in older homes and typically lasts 75 to 100 years. Orangeburg, a tar-paper composite pipe used in mid-century construction, has mostly failed by now and needs replacement wherever it's still in the ground.
Knowing what your line is made of tells you a lot about what to expect. Older materials fail more often and in more dramatic ways.
Signs You Have a Sewer Line Problem
Sewer line issues almost always announce themselves before they become full backups. Catching the signs early is the difference between a targeted spot repair and a full excavation.
Watch for slow drains throughout the house, not just one sink. If your shower, your kitchen sink, and your toilet are all sluggish at the same time, the problem isn't in any one of those fixtures. It's in the main line they all feed into.
Gurgling sounds from toilets or drains when you run water elsewhere in the house indicate trapped air in the sewer line, usually caused by a partial blockage. Sewage smells inside the house or near the yard are another clear signal. A functioning sewer line is sealed. If you can smell it, something isn't sealed anymore.
Soggy patches in the yard that stay wet when the rest of the lawn is dry, or an unusual strip of bright green grass, often mean wastewater is leaking into the soil and fertilizing that spot. Sewage backing up into a tub, shower, or basement drain is the most urgent sign and means the line is blocked or broken enough that waste has nowhere else to go.
Foundation cracks, sinkholes, or pest activity near the house can also trace back to a failing sewer line. Once soil erodes underneath a home, the structural problems that follow are expensive.
What Causes Sewer Lines to Fail
Tree roots are one of the most common causes of sewer line damage in Lancaster. Roots seek out moisture, and even the smallest crack or loose joint in an underground pipe is enough to pull them in. Once roots are inside, they grow, they catch waste, and they eventually break the pipe open.
Age is the next biggest factor. Every pipe material has a lifespan, and once it's reached that point, failure is a matter of when, not if. Clay and Orangeburg pipes in older Lancaster County homes are the most likely candidates for age-related failure right now.
Shifting soil causes pipes to sag, separate at joints, or crack outright. Freeze-thaw cycles during a Pennsylvania winter speed this up, especially on older materials. Corrosion is a concern with cast iron, which rusts from the inside out and eventually collapses.
Grease, wipes, and other items that shouldn't go down a drain build up slowly over the years. Even products marked "flushable" don't break down the way toilet paper does. Over time, the buildup narrows the pipe and catches everything else that comes through.
How Sewer Line Problems Get Diagnosed
Guessing at a sewer line problem is a good way to tear up a yard for nothing. A proper diagnosis starts with a camera inspection. A waterproof camera on a flexible cable gets fed into the line through a cleanout, and the plumber watches a live feed as it travels through the pipe.
This shows exactly where the problem is, what kind of problem it is, and how far down the line it sits. A root intrusion looks nothing like a collapsed section, and a crack looks nothing like a grease blockage. Seeing the inside of the pipe is the only way to know which you're dealing with.
Once the issue is identified, the camera's location transmitter marks the exact spot on the surface above. That means any excavation or access work happens precisely where it needs to, not across the whole yard.
Repair vs. Replacement
Not every sewer line problem needs a full replacement. The right approach depends on what the camera finds.
A repair makes sense when the damage is isolated. A cracked section of pipe, a root intrusion concentrated in one spot, or a single failed joint can usually be handled as a targeted fix. The rest of the line stays in place.
Replacement comes into play when the damage is spread out or the pipe material is at the end of its life. If a camera inspection shows multiple cracks, widespread root intrusion, or collapsed sections across more than half the line, patching one area just delays another repair somewhere else in the same pipe. Clay and Orangeburg lines that have started failing almost always need full replacement rather than repair.
Your plumber should walk you through what the camera showed and why they're recommending one approach over the other. That conversation is where you make a real decision.
Trenchless Sewer Repair Methods
Trenchless repair is the biggest shift in residential plumbing in the last few decades. Instead of digging a trench the full length of the pipe, plumbers access the line at one or two points and work through it.
Pipe lining, sometimes called cured-in-place pipe, involves pulling a flexible, resin-coated liner through the existing sewer line. Once it's in position, the liner is inflated and cured in place, forming a new pipe inside the old one. The result is a seamless, jointless pipe that's stronger than what it replaced and resistant to root intrusion.
Pipe bursting is the method of choice when the old pipe is too damaged to be lined. A hydraulic head is pulled through the line, breaking the old pipe outward into the surrounding soil while simultaneously pulling a new HDPE pipe into place behind it. The new line is solid and continuous.
Both methods preserve the yard, the driveway, and anything else above the pipe. Only small access points are dug, usually at either end of the repair area. For Lancaster County homeowners with landscaping, mature trees, or hardscaping they don't want torn up, trenchless is almost always worth asking about.
Traditional Excavation
Traditional dig-and-replace is still the right call in certain situations. If the pipe has fully collapsed, if trenchless methods aren't feasible for the line's condition or depth, or if the grade of the pipe needs to be corrected, a plumber will excavate down to the damaged section and replace it.
The work itself is straightforward: dig down to the pipe, cut out the bad section, install a new pipe with the correct slope, connect it properly at both ends, and backfill. Restoration of the yard, driveway, or sidewalk above follows.
Excavation takes longer than trenchless, and it's more disruptive, but for some failures, it's the only option that actually fixes the problem.
What to Expect During a Sewer Line Repair
Most sewer line repairs take one to three days. A targeted trenchless repair can often be done in a single day. Full replacements, especially with excavation, run closer to three to five days, depending on the length of the line and what's above it.
Before work starts, utility lines, sprinklers, and buried obstacles get marked. If your pipe runs under a neighbor's property, you'll need their written permission. Most repairs also require a permit from the municipality.
During the work, water service to the house may be interrupted for short periods, and you should avoid sending anything down the drains while crews are working on the line. The noise can be significant, especially on excavation jobs. Plan accordingly if you work from home.
Once the repair is complete, a final camera inspection confirms the line is clear and flowing correctly before anything gets backfilled or restored.
Does Homeowners Insurance Cover Sewer Line Repair?
Most standard homeowners' insurance policies do not cover sewer line repair or replacement, because the damage is usually classified as gradual wear rather than a sudden event. There are exceptions. If a sewer line is damaged by something covered under your policy, like certain kinds of accidents, some claims may go through.
Many homeowners buy a separate service line endorsement or a home warranty that specifically includes sewer line coverage. If you have an older home with aging pipes, that's worth looking into before a problem hits. Call your insurance agent and ask directly what's covered and what isn't.
How to Keep Your Sewer Line Working Longer
A few habits go a long way toward keeping a sewer line out of trouble. Don't flush anything except toilet paper and waste. Flushable wipes, paper towels, feminine products, and dental floss all contribute to blockages over time.
Keep grease out of the kitchen drain. Let it cool and throw it in the trash. Grease that makes it into the line hardens against the pipe walls and catches every other piece of debris that follows.
Be aware of trees planted near your sewer line. If you've got mature trees within 20 or 30 feet of where the line runs, the risk of root intrusion goes up. A camera inspection every few years catches root problems while they're still small.
For homes with older pipe materials, consider getting a baseline inspection so you know what shape the line is actually in. Knowing you've got 10 good years left is a different conversation than finding out during a backup that you've got none.
When to Call a Plumber
Some sewer line issues can wait a day or two. Others can't. Call a plumber right away if you have:
- Sewage backing up into tubs, showers, toilets, or floor drains
- Multiple drains in the house are running slowly at the same time
- Sewage smells inside the home or coming from the yard
- A wet or sunken patch in the yard over the sewer line
- Gurgling from toilets or drains that doesn't go away
At Tom Falk Plumbing and Heating, we've been handling sewer line problems for Lancaster County homeowners since 1961. Our team runs camera inspections to diagnose the issue, explains exactly what's going on, and walks you through the repair options before any work starts.
If you're dealing with a potential sewer line issue, don't wait for it to turn into a backup. Schedule service online or call us today.
