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AI Visibility Index · September 2026

Plumbers in Los Angeles that AI assistants recommend

We asked ChatGPT, Claude, Gemini and Grok the four questions a buyer asks when looking for plumbers in Los Angeles, three times each, in English, and counted who they named. These are the businesses named in two or more of the 48 answers.

Check whether AI names youSee the ranking

Names are printed as the assistants wrote them. We have not checked that any of them is good, open, or real.

Plumbers · Los Angeles
40%of answers named Rooter Hero Plumbing
Answers
48
Businesses named
53
Named only once
34
Named by 2+ assistants
11 of 19
Named again on a rerun
34%

Edition September 2026. Download the data

Asked for plumbers in Los Angeles, ChatGPT, Claude, Gemini and Grok most often named Rooter Hero Plumbing (40% of answers), Mike Diamond Services (29%) and Mr. Rooter Plumbing of Los Angeles (29%). Across 48 answers they named 53 different businesses, 34 of them only once. Each of four buyer questions was asked three times, in English, in September 2026.

The ranking

Share is the fraction of the 48 answers that named a business. The range under it is a 95% confidence interval: where two ranges overlap, the gap between those businesses could be chance.

Plumbers in Los Angeles named by AI assistants, September 2026
#BusinessShareChatGPTClaudeGeminiGrokQuestionsAvg. position
1Rooter Hero PlumbingAlso written Rooter Hero Plumbing & Air40%95%: 27 to 54%17%42%100%0%4 of 41.6
2Mike Diamond ServicesAlso written Mike Diamond Plumbing29%95%: 18 to 43%8%50%58%0%4 of 42.9
3Mr. Rooter Plumbing of Los Angeles29%95%: 18 to 43%8%17%83%8%4 of 43
4Benjamin Franklin PlumbingAlso written Benjamin Franklin Plumbing of Los Angeles25%95%: 15 to 39%0%0%92%8%4 of 43.2
5Spot On Plumbing21%95%: 12 to 34%0%0%83%0%4 of 44.7
6Roto-Rooter Plumbing & Water CleanupAlso written Roto-Rooter Plumbing & Water Cleanup Los Angeles, Roto-Rooter Plumbing & Water Cleanup of Los Angeles19%95%: 10 to 32%25%8%33%8%3 of 42.8
7Monkey Wrench Plumbing, Heating, Air & Electric8%95%: 3 to 20%0%0%33%0%2 of 42.5
8Pro Quality PlumbingAlso written Pro Quality Plumbing & Rooter8%95%: 3 to 20%33%0%0%0%3 of 43.3
9Drain Doctor Plumbing8%95%: 3 to 20%0%0%33%0%2 of 45.5
10The Plumber Guy6%95%: 2 to 17%17%8%0%0%3 of 41.3
11The Plumber Guys6%95%: 2 to 17%17%8%0%0%3 of 41.3
12The Water Heater Company6%95%: 2 to 17%8%17%0%0%1 of 41.3
1324/7 Rooter & Plumbing6%95%: 2 to 17%25%0%0%0%2 of 42.7
14Plumbing Connection6%95%: 2 to 17%17%8%0%0%3 of 42.7
15The Drain Guys6%95%: 2 to 17%8%17%0%0%2 of 42.7
16Good Guy Plumbing6%95%: 2 to 17%25%0%0%0%2 of 43
17JW Plumbing, Heating and Air6%95%: 2 to 17%0%0%25%0%2 of 45.7
18Roto-Rooter Plumbing & Drain ServiceAlso written Roto-Rooter Plumbing & Drain Service – Los Angeles, Roto-Rooter Plumbing & Drain Services – Los Angeles4%95%: 1 to 14%8%8%0%0%1 of 41
19Monterey Park Plumber4%95%: 1 to 14%0%17%0%0%2 of 42.5

Each assistant column is the share of that assistant's own answers. Questions counts how many of the four produced the name at least once; position is where it came in the answer's list, 1 being first. 34 more names came up in a single answer and are counted above but not listed.

What each assistant said

The same questions, the same number of times, and often different names. Each column is one assistant's top five from the ranking above, with the share of its own answers that named them.

#ChatGPTClaudeGeminiGrok
1Pro Quality Plumbing33%Mike Diamond Services50%Rooter Hero Plumbing100%Mr. Rooter Plumbing of Los Angeles8%
2Roto-Rooter Plumbing & Water Cleanup25%Rooter Hero Plumbing42%Benjamin Franklin Plumbing92%Benjamin Franklin Plumbing8%
324/7 Rooter & Plumbing25%Mr. Rooter Plumbing of Los Angeles17%Mr. Rooter Plumbing of Los Angeles83%Roto-Rooter Plumbing & Water Cleanup8%
4Good Guy Plumbing25%The Water Heater Company17%Spot On Plumbing83%No other name twice
5Rooter Hero Plumbing17%The Drain Guys17%Mike Diamond Services58%

Grok named no business in 11 of its 12 answers.

Named here? Put it on your site

Every business in the ranking was named in two or more answers. The badge says that and nothing more: no position, because the ranges above do not support one. It links back to this page, so anyone can check.

Correct or remove a listing
Named by AI assistants: Plumbers in Los Angeles, AIGROW AI Visibility Index, September 2026
<a href="https://aigrow.gg/index/plumbers/los-angeles"><img src="https://aigrow.gg/badges/index/2026-09/plumbers/los-angeles.svg" width="312" height="100" alt="Named by AI assistants: Plumbers in Los Angeles, AIGROW AI Visibility Index, September 2026"></a>

The questions

Asked word for word, three times each, to every assistant through its API. The prompt is the one the free scan uses. No web search, no location and no chat history, so every answer starts from the same place.

  1. 1Who is the best plumber in Los Angeles?
  2. 2I have a leaking pipe at home in Los Angeles. Which plumbing company should I call?
  3. 3I need an emergency plumber in Los Angeles tonight. Who would you recommend?
  4. 4Which plumber in Los Angeles would you trust to replace a water heater?

How to read this page

The full method
What it measures
Which names these models produce when asked cold, from what they learned in training. It is not a review, a rating or our recommendation, and a business missing here may simply be one the models were never shown.
Why the ranges matter
48 answers is a sample. Asked again next month, most shares will move by a few points; the ranges say how far they could move by chance alone.
One business, several spellings
Branches, legal suffixes and spellings of one business are merged, and the other spellings are printed under its name. Names that might be two businesses are kept apart.
A name is wrong
If a business here is closed, misnamed or yours and you want it removed, tell us. We correct or remove it when the page is next published.

Elsewhere in the Index

Plumbers elsewhere
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Also in Los Angeles
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Edition September 2026 · data under CC BY 4.0