A Gaithersburg plumbing inspection is a plumber's check of the water heater, supply and drain lines, fixtures, shutoffs, pressure and gas connections, with a sewer camera available on request. With the city's median home built around 1989, it usually focuses on aging equipment more than failing pipe. Call the number on this page to be connected with a local plumber in Gaithersburg.

Gaithersburg conditions
Gaithersburg went from farm town to a busy I-270 suburb, with an Old Town around the MARC station and planned neighborhoods such as Kentlands. Its housing is younger than the inner suburbs, with a median build year of about 1989. In a house that age the supply piping is often fine, while the water heater, pressure-reducing valve, toilet fill valves, supply hoses and shower cartridges may be on their first or second round of wear.
WSSC Water runs the mains and the sewer here. The city adds its own layer for building work: Gaithersburg Planning and Code Administration issues building permits, while plumbing and gasfitting permits and inspections come from WSSC Water. WSSC's simpler homeowner permit path doesn't cover gas fitting, testable backflow devices, buried piping deeper than four feet or connections to WSSC's service connection, so that work is filed by a registered plumber.
Which check do you need?
| Option | What it covers | Best for |
|---|---|---|
| General home inspection | A broad look at the whole house; plumbing gets a quick pass | Every purchase, as a baseline |
| Plumber's inspection | Water heater, valves, pressure, fixtures, visible drains, gas connections | Homes from the 1980s and 1990s with original equipment |
| Plumber's inspection plus camera | All of the above plus video of the main drain to the street | Mature trees, past backups or slow drains |
Signs it's worth booking
- No one knows the water heater's age, or the label is unreadable
- Water hammer or banging when the washer shuts off
- Toilets that run on their own or rock at the base
- Rust or green crust on valves and fittings near the heater
- A slow drain in the lowest level of the house
Timing and seasonal notes
For buyers, the best time is early in the inspection contingency, which leaves room to get quotes or ask the seller for credits. Owners often book in fall, before freezing nights, so the plumber can check outdoor faucets, crawlspace and garage piping and the irrigation shutoff. If the yard has an in-ground sprinkler system, its backflow assembly needs a yearly test by a WSSC-certified cross-connection technician, with results sent to WSSC by a registered master plumber; spring start-up is the natural time.
If something is found on the street side of the property, such as a leak near the meter, that's a WSSC Water matter. Inside the property line, it's the owner's job to repair.
Plumbing Inspection questions in Gaithersburg
The home inspector already went through the house. Why add a plumber?
Who issues the permit if the inspection leads to repairs?
Does the water heater get checked, and does replacing it need a permit?
How long does a plumbing inspection usually take?
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