For a Gaithersburg plumbing emergency, close the main water valve to stop the flooding, and if you smell gas, leave and call 911 and Washington Gas at 844-WASHGAS (927-4427), option 1, from outside. Then call the number on this page to be connected with a local plumber in Gaithersburg.

How Gaithersburg is served
WSSC Water runs the water mains and sewers in Gaithersburg, and it posts notices when it repairs a broken main in town. Washington Gas supplies natural gas. Housing is younger than in the inner suburbs, with a median build year of 1989, so emergencies in Kentlands, DuFief and the subdivisions off MD 124 tend to involve water heaters, washer hoses, toilet supply lines and fixture valves more than crumbling old pipe. Homes closer to Old Town and Frederick Avenue are more likely to have aging drain lines.
Two offices matter when a repair needs paperwork. WSSC Water Permit Services issues plumbing and gasfitting permits and inspects that work, while the City of Gaithersburg's Planning and Code Administration handles building permits. WSSC's homeowner permit path leaves out gas fitting, testable backflow devices and buried piping more than four feet down, so those jobs go to a plumber or gasfitter holding a WSSC license.
Who takes which call
| Situation | Who to call |
|---|---|
| Water running down the street or from a hydrant | WSSC Water emergencies, 301-206-4002 |
| Pipe burst or water heater leaking inside | A plumber, once the main is closed |
| Sewage backing up in your home only | A plumber to clear the house drain or lateral |
| Sewage spilling from a manhole | WSSC Water emergencies |
| Gas odor indoors or out | Leave, then 911 and Washington Gas |
Signs you shouldn't wait
- Water dripping through a ceiling or spreading across a finished basement
- A toilet or floor drain that gurgles and then pushes up dirty water
- Water in the pan or on the floor around the water heater
- No water at any tap while the neighbors still have pressure
Seasonal timing
Midwinter cold snaps freeze pipes in exterior walls, garages and crawlspaces, and the damage often shows up only when the line thaws and starts spraying. Heavy summer storms push water toward basements and can overwhelm a sump pump or floor drain. Evening, weekend and holiday visits generally cost more than weekday ones, so ask about pricing up front. No arrival time is guaranteed; it depends on the hour and how busy local plumbers are.
Emergency Plumber questions in Gaithersburg
The whole house lost water at once. Is that a utility problem?
Does an emergency gas water heater replacement need a permit?
The water heater tank is leaking. How urgent is that?
Which plumbing problems can wait until a weekday?
More plumbing services in Gaithersburg
Emergency Plumber nearby
Helpful guides
Sources
- WSSC Water: emergency water main repair in Gaithersburg
- WSSC Water: plumbing and fuel gas inspections
- WSSC Water: information for homeowners (permits)
- WSSC Water homeowner permit requirements
- WSSC Water: water quality and emergency contacts
- Washington Gas: safety
- City of Gaithersburg: building permit information
- Gaithersburg housing by year built (city-stats.com)
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