Orangeburg Pipes and Older Sewer Lines: Why Sellers Should Check Before They List
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- 6 min read
If you own an older home, there may be one hidden issue underground that can derail your sale fast: the sewer line.
One of the most concerning materials is Orangeburg pipe, but it is not the only sewer line material that can cause problems. Clay, terracotta, cast iron, concrete, and even newer materials can create expensive surprises if they are damaged, blocked, deteriorating, or invaded by tree roots.
That is why sellers should consider a sewer scope before listing, especially when preparing a home as Certified Pre-Owned.
To learn more about Certified Pre-Owned homes and how this process helps sellers reduce surprises before going on the market, read more here:
What Is Orangeburg Pipe?
Orangeburg pipe is a type of bituminous fiber pipe made from layers of compressed wood pulp and tar-like pitch. It was used primarily for sewer and drainage lines, especially during the post-World War II housing boom when builders needed low-cost, available materials. It was commonly used from the 1940s through the 1970s, although similar fiber pipe products date back much earlier.
The problem is that Orangeburg pipe was not built to last forever. Over time, it can soften, blister, flatten, collapse, or allow tree roots to break through. Many homeowners have no idea they have it until a buyer orders a sewer inspection during the contract period.
That is exactly when you do not want to find out.
Why Sellers Should Care Before Listing
When a buyer discovers a sewer line issue after going under contract, the seller can suddenly be dealing with:
Repair demands
Price reductions
Closing delays
Buyer fear
Renegotiation
Possible contract fallout
A listing that comes back on the market with questions attached
Once a contract falls apart, buyers and agents naturally start asking, “What happened?” or “What is wrong with the house?” That can create unnecessary stigma around a property, even when the issue is fixable.
That is why sellers should take the time to discover these problems before listing, not after the buyer is already in control of the timeline.
A Real Example: A Remodeled Home Still Had a Sewer Problem
We recently helped buyers with a home purchase where the house had been remodeled and permitted. On the surface, everything looked like it had been properly updated.
But after further investigation, an issue with the sewer line was discovered. The estimated cost was in excess of $20,000.
That is the part many sellers miss.
A home can have updated kitchens, baths, flooring, electrical, plumbing fixtures, and permits, yet still have an old sewer line underground that was never replaced, scoped, or properly evaluated.
A sewer line is not something most buyers can see when they walk through the house. It is not something a beautiful remodel automatically fixes. And it is not something you want discovered for the first time after the buyer is emotionally committed, nervous, and looking for reasons to renegotiate.
Another Real Example: Terracotta Pipes in Washington, DC
Real estate agent Rowena Patton purchased a home in Washington, DC in 1998. The home did not have Orangeburg pipe. It had terracotta sewer pipes.
A couple of years later, it was discovered that tree roots had grown through the terracotta sewer line. That is the key lesson for homeowners and sellers:
It is not just Orangeburg pipes that can create sewer problems.
Older clay and terracotta pipes can crack, separate at the joints, shift over time, or allow roots to enter. Once roots find moisture inside a sewer line, they can grow inside the pipe and eventually create backups, blockages, and expensive repairs.
Rowena adds: There may also have been an incident involving a sweet corn husk going down the waste disposal, but that is another story.
The serious point is this: sewer problems are not always about one pipe material. They are about age, condition, installation, soil movement, roots, previous repairs, and whether anyone has actually looked inside the line.
Certify Pre-Owned Your Home Before You List
Most people understand the value of a Certified Pre-Owned car. It has been checked, inspected, documented, and presented with more confidence.
Homes should work the same way.
When you Certify Pre-Owned your home, you complete key inspections and gather important information before the home goes on the market. That may include a general home inspection, seller disclosures, optional appraisal, home warranty, and, for older homes, a sewer scope.
The goal is simple:
Give buyers more confidence upfront.
Reduce surprises later.
Protect the seller from rushed negotiations.
Help prevent contract fallout.
A Certified Pre-Owned home does not mean everything is perfect. It means the seller has taken the time to understand the home before listing it, so buyers can make stronger, cleaner, more informed offers.
It Is Not Just Orangeburg: Other Sewer Line Materials Can Have Issues Too
Orangeburg pipe gets a lot of attention because it is known for deterioration and collapse, but other sewer line materials can also create problems.
Clay or Terracotta Pipes
Clay and terracotta pipes were widely used in older homes. They can last a long time, but they are vulnerable to cracking, shifting, joint separation, and root intrusion. Roots often enter through small gaps at the pipe joints and then expand inside the line.
Cast Iron Pipes
Cast iron was commonly used in many older homes. Over time, it can corrode from the inside, rust, scale, crack, or develop rough interior surfaces that catch debris. In some cases, cast iron lines can collapse or deteriorate under the slab or underground.
Concrete Pipes
Concrete sewer lines can crack, settle, separate, or corrode depending on soil conditions, age, and wastewater exposure. Tree roots may enter through joints or cracks, and older concrete lines can become rough or damaged inside.
PVC or ABS Pipes
PVC and ABS are newer materials and are generally more durable, but they are not immune to problems. Poor installation, low spots, crushed sections, improper slope, ground movement, or damaged joints can still cause backups or drainage issues.
Any Pipe With Tree Root Intrusion
Tree roots do not care what material your pipe is made from. If there is moisture, a crack, a loose joint, or a weak spot, roots may find their way in. Once they do, they can continue growing until the line slows, blocks, or backs up.
Are Orangeburg Pipes Everywhere?
No. Orangeburg pipe was not used in every part of the country, and it was not used in every older home.
It was more likely to be used in areas with heavy post-war construction, neighborhoods built or expanded from the 1940s through the 1970s, and places where builders or municipalities used it as a lower-cost sewer connection material.
However, many homes from the same era used other materials, such as cast iron, clay, terracotta, or concrete. Some areas relied heavily on Orangeburg pipe, while others used it rarely or not at all.
So the question is not simply, “Was my home built in the right decade?”
The better question is:
What is my sewer line actually made of, and what condition is it in?
Warning Signs of Possible Sewer Line Trouble
Sewer line problems are often buried underground, so you may not see obvious evidence during a normal showing or walkthrough.
Warning signs can include:
Slow drains throughout the home
Gurgling toilets or drains
Recurring sewer backups
Sewage smells inside or outside the home
Soft, wet, or unusually green patches in the yard
A sewer line that needs frequent cleaning
Tree roots discovered during cleanout
A sewer scope showing flattened, blistered, cracked, separated, corroded, or collapsed pipe
But here is the key point:
You do not need symptoms to have a problem.
A sewer scope can reveal issues before they become a negotiation crisis.
Why a Regular Remodel or Permit May Not Protect You
Many sellers assume that if a home was remodeled with permits, the major issues must have been addressed.
Not necessarily.
Permits may cover the work that was performed, but they do not automatically mean every underground sewer component was inspected, replaced, or brought into the conversation. A remodeled home can still have an older sewer lateral connecting the house to the street or septic system.
That is why a sewer scope is so important for older homes.
It answers questions that paint, countertops, flooring, and permits cannot.
The Smart Seller Move
Before you list an older home, especially one built or connected to sewer during the 1940s through 1970s, consider making the sewer scope part of your pre-listing strategy.
This allows you to:
Know the condition before buyers do
Avoid surprises during due diligence
Decide whether to repair, disclose, price accordingly, or provide estimates
Reduce the risk of a failed contract
Present the home with more transparency
Give buyers more confidence
Protect your negotiating position
This is exactly why the Certified Pre-Owned process matters.
It moves the difficult discoveries to the front of the process, where the seller has more control.
The Bottom Line
Orangeburg pipe is one of those hidden issues that can sit quietly underground for decades. But it is not the only sewer line concern.
Clay, terracotta, cast iron, concrete, PVC, ABS, and older repaired lines can all have problems depending on age, condition, roots, soil movement, and installation.
Do not wait for the buyer to find it.
Take the time to discover it before you list.
A sewer scope is a small step that can protect your money, your timeline, and the confidence buyers have in your home.
To learn more about Certified Pre-Owned homes and how this process helps sellers reduce surprises before going on the market, read more here:
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