Across Washington DC, of the 18 plumbing companies we list, 18 give a phone number and 15 have a website.
Top 8 plumbing companies in Washington DC
Ranked by how complete and owner-verified the listing info is — hours, phone, website, services. No pay-to-play. Full 2026 ranking
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1Magnolia Plumbing, Heating & CoolingWashington
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2Greenpipe Biotech IncWashington
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3Haynes PlumbingWashington
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4Plumb Right PlumbingWashington
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5Plumber In DCWashington
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6A H Jordan Plumbing & MechanicalWashington
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7H. D. JohnsonWashington
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8D H Stevens Co. Plumbing & HeatingWashington
Cities
Largest first. Towns with a single plumbing company are listed further down this page.
BEFORE YOU GO
Prepare for a plumbing visit
Describe the job, confirm charges and define the assessment.

Describe your job
Match your problem to the right service, prepare a useful description and agree on the first visit's scope.
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Confirm visit charges
Separate the visit, diagnosis and repair so you know what you could owe before approving any work.
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Plan an inspection
Prepare your questions, clarify what an inspection includes and turn the report into a practical next step.
Read the guide