Princeton runs its own wastewater plant, and most in-town homes drain to it through private lines that are the owner's to maintain. With more than half of homes built before 1980, those lines are often older pipe. Call the number on this page to be connected with a local plumber in Princeton.

Princeton's sewer and housing
Princeton is a small town on US 70 in eastern Johnston County. The Town operates its own wastewater treatment plant, which treats about 275,000 gallons a day and discharges to the Little River. The Town reports that USDA funding is paying for an expansion of the plant, and that the state has lifted a sewer moratorium that limited new connections.
The housing is older. Census survey data puts the median home at 1977, and about 57% were built before 1980. In homes from that era, drains are often cast iron inside and clay or cast iron in the yard. Cast iron roughens with age, catching grease and paper, and clay joints can separate and let in roots. When a drain in an older Princeton home keeps clogging, the pipe itself is often part of the cause.
Rural homes in the wider 27569 area may not be on municipal sewer. A plumber can still clear the line from the house to a private system.
For a homeowner, the plant expansion mostly matters when building or adding a connection. It doesn't change who handles a clog in your home's drains or private line: that's a plumber. We didn't find a source naming Princeton's permit office; Johnston County Inspections is likely, so confirm before any repair that needs one.
Old pipe vs newer pipe
| Older cast iron or clay | Newer plastic | |
|---|---|---|
| Common clog causes | Scale, roots, offset joints, grease | Grease, wipes, hair, food waste |
| Usual first step | Cable, then camera if it returns | Cable or auger |
| Jetting | Only after checking the pipe | Works well for grease |
| Long-term fix | Repair or replacement of bad sections | Better habits at the sink and toilet |
Signs to act on
- More than one drain slow at once
- Water rising in the tub when the toilet flushes
- Gurgling sounds from drains
- Sewer odor in the house or yard
Seasonal notes
Roots grow fastest in spring and summer, so root clogs in older Princeton yard lines often show up then. Holiday cooking adds grease to kitchen drains in late fall. If your line needs clearing more than once a year, ask the plumber about a camera inspection.
Drain Cleaning questions in Princeton
Can tree roots get into a drain line?
Should I have a camera run through the line?
What causes a sewer smell from a floor drain or tub?
Is it safe to pour a store-bought drain opener in first?
More plumbing services in Princeton
Drain Cleaning nearby
Helpful guides
Sources
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