NamedTest

Which plumbers does AI name in San Francisco, CA?

Discount Plumbing & Rooter and Mr. Rooter Plumbing of San Francisco were the plumbers AI named most often in San Francisco, CA, in 8 of 20 answers each in October 2026.

Across 20 answers to 10 customer questions, Perplexity and Gemini (model knowledge) named 24 different plumbers. The 6 named most often held 59% of all mentions.

Perplexity named Ace Plumbing & Rooter most often (4 of 10 answers) and Gemini named Discount Plumbing & Rooter most often (8 of 10 answers).

Answers collected October 27, 2026. AI answers change from day to day.

The plumbers AI named most

BusinessAnswers naming it
Discount Plumbing & RooterNamed by Gemini8 of 20
Mr. Rooter Plumbing of San FranciscoNamed by Gemini8 of 20
O'Grady PlumbingNamed by Gemini7 of 20
Pipe SpyNamed by Gemini5 of 20
Ace Plumbing & RooterNamed by Perplexity4 of 20
Advanced Plumbing & DrainNamed by Perplexity4 of 20
Heise's PlumbingNamed by Perplexity4 of 20
Magic Plumbing Heating & CoolingNamed by Perplexity and Gemini3 of 20
Discount Plumbing San FranciscoNamed by Perplexity2 of 20
Sugar Bear PlumbingNamed by Gemini2 of 20

Who each AI tool named

Perplexity

8 of its 10 answers named at least one business.

  1. Ace Plumbing & Rooter (4)
  2. Advanced Plumbing & Drain (4)
  3. Heise's Plumbing (4)
  4. Discount Plumbing San Francisco (2)
  5. Magic Plumbing Heating & Cooling (2)
  6. Cabrillo Plumbing, Heating & Cooling (1)
  7. Dr. Drain Plumbing & Rooter (1)
  8. Five Star Plumbing & Rooter (1)
  9. GENTEEL Plumbers (1)
  10. Hydro Plumbing & Rooter (1)

Gemini (model knowledge)

10 of its 10 answers named at least one business.

  1. Discount Plumbing & Rooter (8)
  2. Mr. Rooter Plumbing of San Francisco (8)
  3. O'Grady Plumbing (7)
  4. Pipe Spy (5)
  5. Sugar Bear Plumbing (2)
  6. A-One Appliance & Plumbing (1)
  7. Apollo Plumbing (1)
  8. ASI (Appliance, Service, Installation) (1)
  9. Express Plumbing Heroes (1)
  10. Flowrite Plumbing (1)

What AI named for each question

The businesses each AI tool named in its answer to each question, in the order the answer named them.

  1. I need an emergency plumber in San Francisco, CA right now. Who should I call?

    Perplexity

    1. Advanced Plumbing & Drain
    2. Heise's Plumbing

    Gemini

    1. O'Grady Plumbing
    2. Sugar Bear Plumbing
    3. Mr. Rooter Plumbing of San Francisco
    4. ASI (Appliance, Service, Installation)

  2. How much does drain cleaning cost in San Francisco, CA, and which plumbers charge fair prices?

    Perplexity

    1. Advanced Plumbing & Drain
    2. Ace Plumbing & Rooter
    3. Dr. Drain Plumbing & Rooter
    4. Hydro Plumbing & Rooter
    5. Kenneth Asire Plumbing

    Gemini

    1. Pipe Spy
    2. Discount Plumbing & Rooter
    3. O'Grady Plumbing
    4. Mr. Rooter Plumbing of San Francisco

  3. Who is the most trusted plumber in San Francisco, CA?

    Perplexity

    1. Heise's Plumbing
    2. Discount Plumbing San Francisco
    3. Ace Plumbing & Rooter

    Gemini

    1. O'Grady Plumbing
    2. Sugar Bear Plumbing
    3. Mr. Rooter Plumbing of San Francisco
    4. Discount Plumbing & Rooter

  4. Which plumbing company in San Francisco, CA is best for water heater repair?

    Perplexity

    1. Advanced Plumbing & Drain
    2. Ace Plumbing & Rooter

    Gemini

    1. Pipe Spy
    2. Discount Plumbing & Rooter
    3. Mr. Rooter Plumbing of San Francisco
    4. Magic Plumbing Heating & Cooling

  5. My basement is flooding in San Francisco, CA. Which plumber can come today?

    Perplexity

    No business named

    Gemini

    1. O'Grady Plumbing
    2. Pipe Spy
    3. Express Plumbing Heroes

  6. Who is the most affordable plumber near San Francisco, CA?

    Perplexity

    No business named

    Gemini

    1. Discount Plumbing & Rooter
    2. Mr. Rooter Plumbing of San Francisco

  7. Which plumbers in San Francisco, CA have the best reviews?

    Perplexity

    1. Discount Plumbing San Francisco
    2. Magic Plumbing Heating & Cooling
    3. Heise's Plumbing
    4. Cabrillo Plumbing, Heating & Cooling
    5. Advanced Plumbing & Drain
    6. Ace Plumbing & Rooter

    Gemini

    1. O'Grady Plumbing
    2. Sugarman Plumbing
    3. Mr. Rooter Plumbing of San Francisco
    4. Discount Plumbing & Rooter
    5. Flowrite Plumbing

  8. I need water heater installation in San Francisco, CA. Which local plumber do you recommend?

    Perplexity

    1. Magic Plumbing Heating & Cooling

    Gemini

    1. O'Grady Plumbing
    2. Discount Plumbing & Rooter
    3. Pipe Spy
    4. Mr. Rooter Plumbing of San Francisco

  9. Is there a 24 hour plumber in San Francisco, CA that answers the phone at night?

    Perplexity

    1. GENTEEL Plumbers
    2. Roto-Rooter
    3. Five Star Plumbing & Rooter

    Gemini

    1. O'Grady Plumbing
    2. A-One Appliance & Plumbing
    3. Mr. Rooter Plumbing of San Francisco
    4. Discount Plumbing & Rooter

  10. What is a reasonable price for sewer line repair in San Francisco, CA, and who should I get quotes from?

    Perplexity

    1. Heise's Plumbing
    2. Lutz Plumbing

    Gemini

    1. Pipe Spy
    2. Discount Plumbing & Rooter
    3. Apollo Plumbing

Sources AI cited

10 of the 20 answers cited sources. The sites cited most, by the number of answers citing them:

  1. consumeraffairs.com (5)
  2. thumbtack.com (5)
  3. genteelplumbers.com (4)
  4. heisesplumbing.com (4)
  5. rotorooter.com (4)
  6. advancedplumbingsf.com (3)
  7. bestprosintown.com (3)
  8. flowmastersplumbing.com (3)
  9. ogradyplumbing.com (3)
  10. serviceagent.ai (3)

Gemini (model knowledge) answers from what it learned in training, without a web search, so it cites no sources.

What the most-named plumbers have in common

0 of the 6 were named by both Perplexity and Gemini. The rest were named by one tool only, which is common: the tools search and remember differently.

4 of the 6 had their own website among the sources the answers cited, and AI gave a website for 6 of them.

By the kind of question: 5 of them came up for urgent requests, 6 for questions about price, 5 for questions about trust and reviews, and 6 for questions about a specific service.

How we measured this

We asked 10 questions a customer might ask about plumbers in San Francisco, CA, once on each AI tool, through each tool's official API. For example:

  • I need an emergency plumber in San Francisco, CA right now. Who should I call?
  • Who is the most trusted plumber in San Francisco, CA?
  • Which plumbing company in San Francisco, CA is best for water heater repair?

Perplexity searches the web and shows its sources. Gemini (model knowledge) answers without a web search, from what the model learned in training, so its picks can be out of date. A language model read each answer and listed the businesses it named, and a business counts once per answer. These results describe what AI said on these dates. They are not a rating of any business's work.

Data as of October 27, 2026.

Corrections

If a business name was misread, or a business is listed that has closed, email hello@namedtest.com. We check it against the stored answers and correct the page.

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Read the guide: How to get AI to recommend your plumbing business

Questions about this page

Which plumbers does AI name most in San Francisco, CA?

Discount Plumbing & Rooter and Mr. Rooter Plumbing of San Francisco were the plumbers AI named most often in San Francisco, CA, in 8 of 20 answers each in October 2026.

Which AI tools were asked, and when?

Perplexity and Gemini, 10 customer questions each, answered between October 27, 2026 and October 27, 2026. Gemini (model knowledge) answers from what the model learned in training, without a web search.

How can a plumber get named by AI more often?

Make the business easy for AI to read and to trust: let AI crawlers into your website, keep your name, address and phone the same everywhere, answer common customer questions on your site, and earn reviews on the sites AI cites. The free check shows whether AI names your business today.