Who are the best plumbers in Washington, DC according to AI?

Across 12 live AI answers, the most-named are: District Capital Services & SLO-FLO Plumbing, Roto-Rooter Plumbing & Water Cleanup, DC Department of Licensing and Consumer Protection (DLCP).

How does AI decide which plumbers to recommend in Washington, DC?

AI engines synthesise review sites, directories, local press and community threads. Businesses named most often gain the most visibility — it measures visibility, not quality.

AI Thinks That

What AI actually recommends — captured, ranked, kept honest.

← Washington City Guide · plumbers · snapshot 2026-10-07

Who are the best plumbers in Washington?

AI thinks that the top 10 plumbers in Washington are…

How it works

We asked every big AI at once the same buyer questions, verbatim. Here’s what they actually said — the Top 10, and all 60 they named.

Top 10

#	Business	Named	Named by
1	District Capital Services & SLO-FLO Plumbing	5×	Claude, Google AI, Perplexity
2	Roto-Rooter Plumbing & Water Cleanup	4×	Claude, Perplexity
3	DC Department of Licensing and Consumer Protection (DLCP)	3×	Claude, Google AI
4	F.H. Furr Plumbing, Heating, Air Conditioning & Electrical	3×	Claude, Google AI
5	John C. Flood	3×	Google AI
6	Spartan Plumbing	3×	Claude, Google AI
7	Spartan Plumbing, Heating and Air Conditioning	3×	Claude, Google AI
8	Ask About Hourly Rates vs. Flat Rates	2×	Google AI
9	Aspen Hill Plumbing / MoCo Plumbing	2×	Google AI
10	Cardinal Plumbing, Heating & Air	2×	Claude

Full ranking (60)

#	Business	Named	Named by
1	District Capital Services & SLO-FLO Plumbing	5×	Claude, Google AI, Perplexity
2	Roto-Rooter Plumbing & Water Cleanup	4×	Claude, Perplexity
3	DC Department of Licensing and Consumer Protection (DLCP)	3×	Claude, Google AI
4	F.H. Furr Plumbing, Heating, Air Conditioning & Electrical	3×	Claude, Google AI
5	John C. Flood	3×	Google AI
6	Spartan Plumbing	3×	Claude, Google AI
7	Spartan Plumbing, Heating and Air Conditioning	3×	Claude, Google AI
8	Ask About Hourly Rates vs. Flat Rates	2×	Google AI
9	Aspen Hill Plumbing / MoCo Plumbing	2×	Google AI
10	Cardinal Plumbing, Heating & Air	2×	Claude
11	D.C. Department of Licensing and Consumer Protection (DLCP)	2×	Google AI
12	DC Water’s Lead Pipe Replacement Assistance Program (LPRAP)	2×	Google AI
13	Fry Plumbing	2×	Claude, Google AI
14	Magnolia Plumbing, Heating & Cooling	2×	Claude
15	Angi (formerly Angie's List)	1×	Claude
16	Ask for referrals	1×	Claude
17	Brian B. Quick Plumbing	1×	Google AI
18	Check DC licensing	1×	Claude
19	Check for	1×	Claude
20	Consistently top-rated	1×	Google AI
21	ConsumerAffairs’ 2026 Washington, DC plumber guide	1×	Perplexity
22	Customer feedback	1×	Google AI
23	Day & Night Plumber	1×	Perplexity
24	Dick Chandler’s Plumbing Service	1×	Perplexity
25	Fry Plumbing, Heating & AC	1×	Google AI
26	Fry Plumbing, Heating And Air Conditioning	1×	Claude
27	Great for homebuyers	1×	Google AI
28	Heil Plumbing	1×	Google AI
29	Historic Rowhouse Needs	1×	Google AI
30	HomeAdvisor or Thumbtack	1×	Claude
31	How to Vet a Plumber in DC	1×	Google AI
32	Ideal for	1×	Google AI
33	Lead Pipe Replacement	1×	Google AI
34	Lead Service Lines	1×	Google AI
35	Licensing verification	1×	Claude
36	Local rowhouse specialists	1×	Google AI
37	Long track record	1×	Google AI
38	Metropolitan Washington Builders' Exchange	1×	Claude
39	MoCo Plumbing	1×	Google AI
40	No evening/weekend premiums	1×	Google AI
41	Over a century of experience	1×	Google AI
42	Plumber In DC	1×	Perplexity
43	Review platforms	1×	Claude
44	Service Specialties	1×	Google AI
45	ServiceAgent score of 8.5/10	1×	Perplexity
46	SirOne Plumbing Services	1×	Perplexity
47	SLO-FLO Plumbing	1×	Google AI
48	The Honest Plumbing	1×	Google AI
49	The Honest Plumbing & Drain Service	1×	Google AI
50	Top-Rated Regional & Independent Businesses	1×	Google AI
51	Trusted reputation	1×	Google AI
52	Understand Rates	1×	Google AI
53	Use trusted review platforms	1×	Claude
54	Verify D.C. Licensing	1×	Google AI
55	Verify Licensing	1×	Google AI
56	Verify Their DC License	1×	Google AI
57	Vito Services	1×	Google AI
58	Walker & Son’s Plumbing	1×	Perplexity
59	Well-Established Local & Historic Home Specialists	1×	Google AI
60	Why call them	1×	Google AI

How this list was made

When2026-10-07 — a single snapshot. Engines5 queried; returned answers: Claude, Google AI, Perplexity, openai. Prompts3 buyer questions, asked verbatim; every engine got all. Answers12 captured verbatim (engine + timestamp), nothing edited. Rankingby number of mentions across all answers; ties broken by engines naming it. Mentions ≠ quality. Coverage60 businesses named in total. Independencenothing bought or placed; Memeador is not in the ranking.

Prompts asked

“Who are the best plumbers in Washington, DC?”
“Can you recommend a good plumber near Washington, DC?”
“I'm looking for a good plumber in Washington, DC. Who should I call, and why?”

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These scores are live — click any business to see how often AI named it over time; click again to close.