The short answer
Orangeburg pipe is sewer line made of wood fiber pressed together and soaked in coal tar pitch, basically rolled tar paper. A lot of Northern Virginia houses built from the late 1940s into the early 1970s got it for the line from the house to the street. It doesn’t crack like clay or cast iron. It softens, blisters and slowly flattens under the weight of the ground. If your house is from those years and the sewer line has never been replaced, there’s a real chance part of it is Orangeburg, and a camera is the way to know.
Why so many houses here have it
Orangeburg is named for the town in New York where it was made. It had been around for decades, but after the Second World War metal was short and houses went up fast, and fiber pipe was cheap, light and easy to cut. That’s the same window when whole neighborhoods were built across Arlington, Falls Church, Alexandria, Annandale, Springfield and McLean. Plastic pipe replaced it by the early 1970s.
The usual pattern in those houses: cast iron inside, through the basement and out the foundation wall, then Orangeburg from just outside the wall to the street. So a cast iron stack in the basement doesn’t tell you what’s in the yard.
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How it fails
Fiber pipe takes on water. Over years it softens, the inside blisters and flakes, and the round pipe squashes into an oval and then flatter, so less and less gets through. Roots find the joints, which were never tight to begin with. Most of this pipe is past 50 years old now, and that’s roughly what it was ever expected to last.
Signs your Orangeburg line is going
- The main line clogs again and again, a few months apart.
- Several drains are slow at once, or the tub gurgles when the toilet flushes.
- A basement floor drain backs up.
- A strip of lawn over the line stays greener or soggier than the rest.
- A low spot or a small sinkhole opens in the yard along the line.
- A sewer smell outside near the house. What a sewer smell means.
How to find out
Look at the cleanout first, the capped pipe outside near the foundation. If you can see pipe in it that’s black and looks like tar paper rather than white or black plastic, that’s a strong hint. Where your sewer cleanout is shows where to look. The sure answer is a camera down the line: fiber pipe shows up on screen as black walls with blisters and flakes, and a round pipe gone oval is easy to see. It’s $89 added to a visit, and you see the footage. Buying an older house? A sewer camera before you close is one of the best looks you can take. When a sewer camera inspection is worth it.
What fixes it
Clearing the line, $550 to $1,650 for the main line, gets the water moving and buys time. It doesn’t fix a pipe that’s flattening. And go easy with water at pressure: a jetter on softened fiber pipe can tear it up, which is why we put a camera in first and never jet a pipe we haven’t seen. Hydro jetting explains when it’s the right call.
The fix for Orangeburg is usually replacing it outright. Where a section still holds its round shape, a new pipe can sometimes be cured inside the old one without a trench. Where it’s flattened, the ground gets opened and a new PVC line goes in. The camera decides which. Trenchless sewer repair covers both, and what a new sewer line costs in Northern Virginia has the prices with the monthly payments next to them.
Don’t wait for the backup
An Orangeburg line rarely fails all at once. It gets slower for years and then backs up on a holiday weekend. If your house is from the 1950s or 1960s, the main line has clogged more than once, and nobody has ever put a camera down it, that’s the time to look, while it’s a choice and not an emergency.
When you’d rather we do it
A sink clogged at the trap is $99 with our sink clearing offer, up to the P-trap. A toilet, tub, shower or any drain past the trap is drain cleaning, $200 to $800. The main line to the street runs $550 to $1,650, and when grease or roots keep coming back, hydro jetting clears the pipe wall. You get the price before we start. A plumbing diagnosis visit is $49, or $250 after hours.
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Questions people ask
What is Orangeburg pipe?
Sewer pipe made of wood fiber soaked in coal tar pitch, used for house sewer lines from the late 1940s into the early 1970s. It softens and flattens over time instead of cracking.
How do I know if I have Orangeburg pipe?
Black, tar paper looking pipe at the cleanout is a hint. A sewer camera inspection tells you for sure, along with how much of the line it is and what shape it’s in.
How long does Orangeburg pipe last?
It was expected to last about 50 years, and nearly all of it in the ground today is older than that. Many lines are still working, but they’re on borrowed time.
Can Orangeburg pipe be lined?
Only where it still holds its round shape. Once it has flattened, the section has to be dug up and replaced. A camera shows which.
Should I hydro jet an Orangeburg line?
Not without a camera first. High pressure water can tear up fiber pipe that’s already soft.
