Dumfries, chartered in 1749, runs its own Building and Inspection Department, so plumbing and mechanical permits inside town limits come from the Town rather than Prince William County. Water and sewer come from Prince William Water. Call the number on this page to be connected with a local plumber in Dumfries.

How the call works
Explain what kind of business it is, what's wrong and whether you can stay open. You'll be connected with an independent local plumber who takes commercial work in Dumfries, whether that's a shop on Main Street, a restaurant on Route 1 or an office near Route 234 and I-95. Ask about scheduling and how the work will be priced before it starts.
What affects cost
- The size of the space and number of fixtures
- Town permits and inspections for plumbing, sewer and water service work
- Backflow repairs and retesting
- Camera inspection before sewer or drain repairs
- After-hours scheduling
Dumfries specifics
Dumfries is the oldest continuously chartered town in Virginia, a former colonial tobacco port near Quantico Creek that's now a commuter town just east of I-95. Its Building and Inspection Department at Town Hall, 17739 Main Street ((703) 221-3400), handles building and trade permit applications online and inspects plumbing, mechanical, sanitary sewer and domestic water service work. The County's Building Development Division doesn't issue permits inside town limits, so make sure your plumber files with the Town.
Prince William Water supplies Dumfries with Occoquan Reservoir water treated at Fairfax Water's Griffith plant and describes it as moderately hard (61 to 120 mg/L). It also handles sewer service for much of the town, and eastern Prince William wastewater goes to the H.L. Mooney facility. Its cross-connection program calls for testable backflow devices to be tested at installation or repair and every year after, with results sent to its coordinator. Main breaks go to Emergency Dispatch at (703) 335-7990; water quality questions go to 703-331-4162.
Columbia Gas of Virginia and Washington Gas both operate in Prince William County, so the bill tells you which serves your building. If anyone smells gas, get everyone out, then call 911 and that gas company from outside.
Before the plumber arrives
- Find the main shutoff and cleanouts
- Have the water bill and backflow records ready
- Clear access to restrooms, kitchen and mechanical areas
- Note when the problem started
- Know whether the lease puts repairs on the tenant or the owner
Older buildings near the historic Main Street core can have tight crawlspaces and older drain lines, so tell the plumber about access in advance.
Commercial Plumbing questions in Dumfries
Which office handles commercial plumbing and gas permits for our address?
How often must a business's backflow assemblies be tested in this area?
How can a restaurant keep grease from clogging its lines?
Who pays for plumbing repairs in a leased commercial space?
More plumbing services in Dumfries
Commercial Plumbing nearby
Sources
- Prince William Water: water quality and supply FAQ
- Prince William Water: water quality reports
- Prince William Water: backflow prevention and cross-connection control
- Potomac Local: sewer maintenance in Dumfries
- Town of Dumfries: building and inspections
- Prince William County Development Services: areas we serve
- Prince William County annex, Northern Virginia Hazard Mitigation Plan
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