What it is and why it ended up under Littleton yards
Orangeburg pipe is made from layers of wood pulp bonded with coal tar pitch. It takes its name from Orangeburg, New York, where it was manufactured. It is light enough to carry by hand, cuts with a saw, and costs a fraction of what clay or cast iron did.
After the Second World War, American housing went up faster than it ever had, and in Littleton as everywhere else that meant looking for ways to build quickly and cheaply. Orangeburg was approved for sewer laterals and used extensively from 1945 until it was phased out around 1972, as PVC took over.
How it fails
Clay cracks. Cast iron corrodes. Orangeburg does neither — it deforms.
Soil pressing down on a pipe made of bonded fibre gradually squashes it. The round bore becomes a slight oval, then a pronounced one, then nearly flat. Flow capacity drops year by year, which is why the symptom is usually a line getting steadily slower over a long period rather than blocking suddenly.
Along the way, the deforming wall delaminates and blisters inward, catching anything passing through. By the time most Orangeburg lines are inspected, the bore is a fraction of what it was and the pipe has lost all structural integrity.
Why it cannot be lined
This is the question every Orangeburg homeowner asks, because lining is cheaper and less disruptive than digging.
A CIPP liner is inflated against the inside of the existing pipe and cured there, so it takes the shape of whatever it cures against. If the host pipe is round, you get a round liner. If the host pipe is an oval with blistered walls, you get an oval liner with the same reduced capacity — and the Orangeburg around it carries on deforming regardless, because the liner is not what is holding the soil back.
Pipe bursting is sometimes possible where the line is still roughly round, because the head breaks through rather than curing inside. Where the pipe has gone properly flat, the head has no clean path and open-cut replacement is the reliable route.
Which Littleton homes to check
Any house built or re-plumbed between 1945 and 1972. That covers a substantial part of the city's post-war growth, including much of the Columbine area, parts of the Centennial side, and the earliest phases out toward Ken Caryl.
Homes built before 1945 are more likely to have clay. Homes built after about 1975 will have cast iron or PVC. The 1945 to 1972 window is the one worth ruling out specifically.
House from the post-war decades?
A camera run identifies Orangeburg in minutes. Finding it before it flattens changes what the repair costs.
Call (303) 555-0147Catching it before it fails
| Stage | What the camera shows | Options |
|---|---|---|
| Early deformation | Slightly oval, walls intact | Bursting may be possible |
| Advanced deformation | Clearly oval, blistering inward | Replacement |
| Collapse | Flattened, flow stopped | Emergency excavation |
The difference between the first and third rows is years of warning and several thousand dollars. An Orangeburg line that is found early can sometimes be burst, which avoids the trench. One that is found when the basement floods cannot.
If you are buying a house in this age range
A sewer scope before closing is not part of a standard home inspection and has to be booked separately. On a 1960s Littleton property, that inspection is the difference between knowing you have a five-figure job ahead of you and finding out after the deed has changed hands. More on pre-purchase sewer scopes.
Questions we get asked
What is Orangeburg pipe?
Orangeburg is a sewer pipe made from wood fibre bonded with coal tar, manufactured from the 1860s and used widely for residential laterals between about 1945 and 1972. It was light, cheap and quick to install. It was never intended to last the lifetime of a house.
How do I know if I have Orangeburg pipe?
A camera inspection identifies it in minutes — it looks like dark fibrous material rather than glazed clay or metal, and by the time most are inspected the bore is visibly oval rather than round. Houses built or re-plumbed between 1945 and 1972 are the ones to check.
Can Orangeburg pipe be lined?
No. CIPP lining needs a host pipe that still holds a round shape to cure against, and Orangeburg's failure mode is losing that shape. Lining a deformed pipe locks in the deformation. Replacement is the reliable answer.
How long does Orangeburg last?
It was commonly described as a 50-year pipe when installed, and that has proved optimistic in practice. Pipe laid in 1960 is well past that window now. Loading from above, soil moisture and depth all affect how quickly a given run deforms.
Find out before it flattens
Orangeburg gives very little warning between slow and blocked. If your house dates to between 1945 and 1972, knowing what is under the yard is worth an hour.
Platte Sewer Co. — sewer line repair in Littleton, CO. Open 24 hours.