Most of Potomac is on WSSC Water's public sewer, and the line from the house to the WSSC connection is the owner's to repair; some larger properties instead have a private onsite wastewater system. A plumber registered with WSSC handles building sewer repairs under a WSSC permit. Call the number on this page to be connected with a local plumber in Potomac.
Potomac was farmland before it became an affluent suburb centered on Potomac Village, where Falls Road meets River Road, and some older farmhouses still sit among the subdivisions. The median home here was built around 1977. Montgomery County assigns every property a sewer service category, and while most Potomac homes fall in WSSC public sewer areas, some lots are planned for private onsite systems instead. Large lots also mean long laterals, so the pipe between a Potomac house and the street can run a good distance under lawn, driveways and landscaping.
What to do now
- Cut water use in the house to a minimum until the line is cleared.
- If sewage is surfacing from a manhole or in the road, call WSSC Water at 301-206-4002.
- If only your home is backing up, keep children and pets away from the affected drains.
- If your property is not on municipal sewer, tell the plumber when you call; the fix may be in the line to your onsite system rather than a WSSC lateral.
- Locate the outdoor cleanout and clear a path to it.
- Photograph any damage before cleanup.
Signs and their usual causes
| Symptom | Likely cause |
|---|---|
| Gurgling toilets when a tub drains | Partial blockage downstream of both fixtures |
| Basement drain backs up during heavy rain | Stormwater entering a cracked line, or a surcharged main |
| Recurring clog at the same distance | Root intrusion or an offset joint at that spot |
| Wet, lush strip across the lawn | Leaking or broken pipe below |
| Slow drains in a wing far from the main stack | Branch line clog rather than the main |
Cost factors on Potomac properties
- Length of the lateral, which can be long on big lots
- Depth, slope and whether the line passes under a driveway, pool deck or stone walk
- Pipe type: clay or cast iron in older homes, plastic in newer ones
- Whether a liner, pipe bursting or open trench suits the damage
- WSSC permit, inspection and landscape restoration
Sewer service line repairs on WSSC-served Potomac properties are permitted through WSSC Water Permit Services (301-206-4003) and must be done by a plumber registered with WSSC. Ask for the camera footage and a marked-up sketch of where the break sits, so you can compare quotes on the same footing.
Sewer Line Repair questions in Potomac
My property isn't on municipal sewer. What can a plumber still help with?
How do I find out who provides sewer service at my address?
What happens to my lawn, driveway or patio during a sewer repair?
How can I tell a main sewer problem from one clogged drain?
More plumbing services in Potomac
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