Orangeburg Pipe: How to Identify It and What Replacement Costs

Orangeburg pipe is tar-soaked wood fiber sewer line, installed mostly from the 1940s to the early 1970s, that flattens, blisters and collapses with age, so a confirmed run usually needs replacement at $50 to $250 per foot.

What is Orangeburg pipe?

Orangeburg pipe is bituminized fiber sewer pipe made from layers of ground wood pulp bonded with adhesive and impregnated with coal tar pitch. It takes its name from Orangeburg, New York, where most of it was made. Builders used it mainly for the sewer lateral that runs from a house to the city main, because it was cheap, light and easy to cut.

PHCP Pros reports that a 4-inch pipe could contain up to 25 layers of pitch-pressed wood pulp. The Fiber Conduit Co. founded the Orangeburg plant in 1893 and became the Orangeburg Manufacturing Co. by 1948. The same article says the plant closed in fall 1972 as PVC took over, while Wikipedia gives 1974 for the company closing.

Dates vary by source. Wikipedia describes use from the 1860s through the 1970s. PHCP Pros says it connected homes to public sewers between 1940 and 1970 and that the Uniform Plumbing Code permitted it between 1955 and 1982 under the name Bituminous Fiber Sewer Pipe. The City of Ann Arbor calls early 1950s to early 1970s a reasonable assumption for local homes.

Orangeburg sits at the bottom of the lifespan chart in our guide to sewer pipe types and their lifespans, well below vitrified clay, cast iron and PVC.

Why does Orangeburg pipe fail?

Orangeburg pipe fails because its wood fiber walls soak up water, soften and lose their round shape under the weight of the soil above. A Mr. Rooter franchise calls this ovaling. Once the pipe flattens, flow capacity drops, joints open, roots move in and the line eventually caves in. Most surviving runs are now more than 50 years old.

The Mr. Rooter Spokane franchise lists four failure patterns, and the City of Ann Arbor adds a fifth.

• Deformation. Wet fibers soften and the round pipe squeezes into an oval.
• Collapse and sags. Soil pressure flattens sections and creates bellies where waste sits.
• Root intrusion. Roots push through the soft wall and joints, cracking the pipe and blocking flow.
• Delamination and blistering. Layers of wood pulp separate, so the inner wall bubbles and flakes.
• Inside-out rot. Ann Arbor notes solvents and drain cleaners attack the interior first, so the pipe can rot from the inside out.

That inside-out failure is why harsh chemical drain openers are a bad idea on this pipe. Many plumbers also avoid full-pressure hydro jetting on a known Orangeburg line and use a cable machine or camera first, since a soft wall can tear.

How do you identify Orangeburg pipe?

To identify Orangeburg pipe, start with the home’s build date, then look at any exposed sewer pipe at the cleanout or foundation wall for black, layered, tar-coated material that dents or scrapes with a screwdriver. Confirm it with a sewer camera, which shows ovalized, blistered or flaking walls. Ann Arbor notes many cities lack complete records of where it went in.

InspectAPedia describes the pipe as black, fragile, compressed layers of asphalt-impregnated wood pulp that look like tarred piping. Despite the name, it is never orange. Cast iron sounds hard and shows rust when scraped, while Orangeburg feels softer and shows fibrous layers at a cut or broken edge.

Ann Arbor also suggests checking city replacement records and microfilm for similar homes. A plumber cleaning the line may pull out pieces of the pipe wall, which is a strong clue.

Should you buy a house with Orangeburg pipe?

You can buy a house with Orangeburg pipe, but treat the sewer lateral as a known repair and price it into your offer. Order a camera inspection inside your contingency window, get a written replacement bid, and ask the seller for a credit, price cut or completed replacement. A standard home inspection does not look inside the buried sewer line.

A sewer scope inspection before closing is the cheapest protection a buyer has on a 1940s to 1970s house. The camera footage gives you evidence to negotiate with, and the plumber can usually measure the run length and depth at the same visit, which are the two numbers a replacement bid depends on.

1. Ask the seller’s disclosure and the city whether the lateral has ever been replaced.
2. Book a sewer camera inspection and keep a copy of the video.
3. If the camera shows Orangeburg, get two written bids that name the method and footage.
4. Negotiate a credit or repair, and confirm who owns the lateral under your city’s rules.
5. Price a service line endorsement with your insurer before closing.

Ownership varies. In many cities the homeowner owns the lateral all the way to the main, including the part under the street, which can raise the cost.

What are the Orangeburg pipe replacement options?

Orangeburg pipe is usually replaced by traditional trench excavation or by trenchless pipe bursting, which pulls new HDPE pipe through the old path while splitting the old pipe apart. Cured-in-place lining only suits sections that still hold a round shape. Ann Arbor lists trenching, trenchless and pipe bursting as the replacement methods used locally.

The Mr. Rooter Spokane franchise says lining can extend Orangeburg’s life when the pipe keeps its round shape, and otherwise points owners to pipe bursting or excavation with modern PVC or HDPE. The same tradeoffs apply to old metal lines, as our breakdown of cast iron pipe replacement costs shows.

Bursting can be fast. Cleaner magazine reported a 100-foot, 4-inch collapsed Orangeburg lateral in Shinnston, West Virginia, replaced with 4-inch HDPE in a 13-minute pull and about two hours of service disruption.

How much does Orangeburg pipe replacement cost?

Orangeburg pipe replacement costs about the same as any sewer lateral replacement, roughly $50 to $200 per linear foot dug and $60 to $250 per foot trenchless, per Angi data reported by This Old House. A typical job averages $3,320, but long, deep or under-driveway runs cost far more.

Low ends are $50 per foot dug and $60 per foot trenchless (Angi), and $60 per foot in the Mr. Rooter Spokane quote. The bigger swing is restoration. Cleaner reported that conventional excavation on the Shinnston job could have run $85,000 or more, and that bursting saved at least $75,000 on that 11-foot-deep lateral.

Cost drivers to ask about on every bid:

• Length and depth. A deep connection at the main means more digging or bigger pits.
• What sits on top. Driveways, patios, mature trees and sidewalks add restoration cost.
• Street work. If you own the lateral to the main, road cuts and traffic control may be on your bill.
• Permits and inspection. Most cities require a permit and a final inspection for lateral replacement.

For spot repairs, depth surcharges and regional pricing on other materials, see our sewer line repair cost guide.

Does homeowners insurance cover Orangeburg pipe?

Homeowners insurance usually does not cover Orangeburg pipe replacement, because a sewer line that fails from age, deterioration or roots counts as wear and tear, which standard policies exclude. Some insurers sell a service line endorsement that can pay for buried line repair, and sudden water damage inside the house may be handled separately under your main policy.

American Family Insurance describes service line coverage as an optional add-on that helps pay to fix damaged underground sewer, water and power lines, with examples including root invasion and corrosion. Pricing and coverage limits for these endorsements vary by insurer and state, so ask your agent for a quote and the exact limit before you count on it.

Three points to check in your own policy before you file anything:

• Whether the endorsement excludes lines that were already damaged or deteriorated when coverage began.
• Whether the limit covers excavation and lawn or driveway restoration, not just pipe.
• Whether sewer backup damage inside the home needs its own separate endorsement.

A line already confirmed as failing may be treated as pre-existing damage, so add the endorsement early.