Potomac is mostly served by WSSC Water, but Montgomery County assigns every property a water and sewer category, and some are planned for private wells and onsite systems instead of public service. That category, plus WSSC's backflow and permit rules, shapes commercial plumbing work here. Call the number on this page to be connected with a local plumber in Potomac.
Potomac in brief
Potomac grew from farmland into an affluent suburb northwest of Washington, centered on Potomac Village where Falls Road meets River Road. Commercial work here tends to be smaller in scale than in Bethesda or Rockville: village shops and restaurants, professional offices, places of worship and large properties looked after by a manager or caretaker. The median home was built in 1977, and older farmhouses still stand among the subdivisions. WSSC Water supplies most of the area from the Potomac River and the Patuxent reservoirs, adding orthophosphate to coat the inside of pipes, including the owner's plumbing. The catch is that not every parcel is on that public system, so the first question on any job is how the building gets its water and where its wastewater goes.
What to do when something fails
- Shut the supply. Use the fixture stop or the building main. Properties on a private well can also switch off the well pump at its breaker.
- Know your service type. County water categories run W-1 to W-5 and sewer categories S-1 to S-5; owners on private wells or onsite wastewater systems maintain those themselves.
- Public main or sewer problem? WSSC Water's emergency line is 301-206-4002.
- Gas odor? Leave first, then call 911 and Washington Gas at 844-WASHGAS (927-4427), option 1.
- Write it down. Note times, photos and which fixtures were affected for the plumber and for insurance.
Symptoms and what usually causes them
| Symptom | Likely cause |
|---|---|
| Sprinkler backflow device leaks at spring start-up | Freeze damage or a failed check inside the assembly |
| Sinks drain slowly across the whole building | Root intrusion or buildup in the building sewer |
| Pressure swings on a well-served property | Pressure tank or switch problem |
| Boiler room fitting weeping | Worn backflow device or relief valve |
| Sewage odor near a cleanout | Dry trap or a cracked older lateral |
Cost factors
- Distance between the building and the main, well or onsite system
- Locating work, including camera runs or pressure testing
- Backflow work: WSSC requires testable assemblies such as irrigation pressure vacuum breakers and RPZs to be tested yearly and after any installation, repair or relocation, while non-testable dual checks and boiler devices are rebuilt or replaced every five years (program line 301-206-4004)
- WSSC plumbing and gasfitting permits through Permit Services, 301-206-4003
- Off-hours scheduling around customers or events
- Restoring landscaping, paving or finished interiors
Commercial Plumbing questions in Potomac
What if a business property is not on public water or public sewer?
How often does a commercial backflow assembly need to be tested here?
Can commercial plumbing work be scheduled outside business hours?
What do freezing nights do to commercial plumbing?
More plumbing services in Potomac
Commercial Plumbing nearby
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