San Diego, CA · October 2026
Which plumbers in San Diego do AI assistants recommend?
We asked ChatGPT, Gemini, Perplexity and Claude Who is the best plumber in San Diego, CA?
3 times each and counted every plumber they named.
Last updated · 12 answers
- 21plumbers named
- 3named by 3 or more engines
- 22/100answer stability
What the answers show
- Ask four AI assistants about plumbers in San Diego and you get 21 different names. Only 3 of them came up on three or more engines.
- Answers here are unstable. Asking the same assistant the same question three times often produced a different list (stability 22/100), so a single check of your visibility can mislead. ChatGPT varied most, at 4/100.
- Bill Howe Plumbing, Heating & Air and Collins Pacific Plumbing, Inc. were named most often, in 5 of 12 answers each. Bill Howe Plumbing, Heating & Air came up in 3 of 3 Gemini answers but 1 of 3 on ChatGPT.
- Of the directory and review sites, consumeraffairs.com was cited most, in 8 of 12 answers. That is where the assistants went to check plumbers in San Diego.
Plumbers AI assistants named in San Diego
| Plumber | ChatGPT | Gemini | Perplexity | Claude | Total |
|---|---|---|---|---|---|
| 1Bill Howe Plumbing, Heating & Air | 1/3 | 3/3 | 0/3 | 1/3 | 5/12 |
| 2Collins Pacific Plumbing, Inc. | 1/3 | 0/3 | 2/3 | 2/3 | 5/12 |
| 3Core Plumbing | 1/3 | 0/3 | 2/3 | 2/3 | 5/12 |
| 4Primo Plumbing | 1/3 | 3/3 | 0/3 | 0/3 | 4/12 |
| 5Black Mountain Plumbing | 0/3 | 2/3 | 0/3 | 1/3 | 3/12 |
| 6Courtesy Plumbing | 2/3 | 1/3 | 0/3 | 0/3 | 3/12 |
| 7Five Star Plumbing | 0/3 | 0/3 | 1/3 | 2/3 | 3/12 |
| 8California Plumbing SD Inc. | 0/3 | 3/3 | 0/3 | 0/3 | 3/12 |
| 9Exodus Plumbing | 1/3 | 0/3 | 0/3 | 1/3 | 2/12 |
| 10Ideal Plumbing, Heating, Air & Electrical | 0/3 | 2/3 | 0/3 | 0/3 | 2/12 |
Also named: American Ace Plumbing (1), American Plumbing Co. (1), Anderson Plumbing, Heating & Air (1), Coastal Rooter (1), Colepepper Plumbing (1), CSR Plumbing (1), Elite Rooter (1), Frankie's Plumbing (1), Golden State Plumbing & Drain Co. (1), John Padilla Plumbing (1), Voyager Plumbing (1).
Sources AI assistants cited
The websites the engines linked to most often in these answers.
- consumeraffairs.com8 of 12 answers
- serviceagent.ai6 of 12 answers
- local.yahoo.com5 of 12 answers
- bbb.org4 of 12 answers
- cslb.ca.gov4 of 12 answers
Is your business in these answers?
Leolens asks ChatGPT, Gemini, Perplexity and Claude the questions your customers ask, every month, and shows whether they name you and whether what they say about you is true.
Plans start at $799 per month for one location. For plumbing businesses we write your question set with you first, and nothing is charged until it exists.
Why some plumbers show up and others don’t
Assistants recommend what they can find and cross-check. What tends to help:
- Show emergency availability where assistants look for it: 24/7 hours on your Google Business Profile, the same hours on your website, and a phone number a person answers.
- Keep your business name, address and phone number identical on Google, Yelp, Angi, the BBB and HomeAdvisor.
- Publish a page for each job type (water heaters, drain clearing, slab leaks, repiping) and each city you cover, with your license number and what a visit includes.
- Collect reviews that name the job and the neighborhood. "Replaced our water heater in San Diego" gives an assistant more to work with than five stars alone.
Questions
Which plumbers in San Diego do AI assistants recommend most often?
In October 2026, Bill Howe Plumbing, Heating & Air was named in 5 of 12 answers from ChatGPT, Gemini, Perplexity and Claude, followed by Collins Pacific Plumbing, Inc. (5) and Core Plumbing (5). The table above has the full count.
What is the best plumber in San Diego, according to AI?
The assistants do not settle on one. Asked Who is the best plumber in San Diego, CA?
3 times each, they named 21 different plumbers, and 3 came up on three or more engines. Which one an assistant suggests can change from one ask to the next.
Do AI assistants give the same answer every time?
No. Each assistant was asked the same question 3 times. On a 0–100 scale, where 100 means the same names every time, their answers scored 22 on average: ChatGPT 4, Gemini 47, Perplexity 28, Claude 11.
Where do AI assistants get their recommendations for plumbers in San Diego?
From the sources they search and cite. The most-cited here were consumeraffairs.com (8 answers), serviceagent.ai (6 answers), local.yahoo.com (5 answers). A business's own website and listings on those sites are what the assistants read.
Does Leolens rank or endorse these businesses?
No. The table counts how often AI assistants named each business. Leolens did not rate, review or rank them, and no business paid to appear.
How we collected this
In October 2026 we asked ChatGPT (gpt-5.6-terra), Gemini (gemini-3.8-flash), Perplexity (perplexity/sonar) and Claude (claude-sonnet-5) the question Who is the best plumber in San Diego, CA?
3 times each, through each provider’s API with web search turned on, as a new conversation with no account, history or location. A separate model listed the businesses each answer named; we checked every name against the answer’s own text and merged different spellings of the same business. Sources are the sites the engines linked to.
The apps use your location and history, so what you see there can differ. Nothing on this page is a rating or review by Leolens, and no business paid to appear. For how this market compares with the rest, see the October 2026 study.
Spot an error, or want your business removed from this page? Email hello@tryleolens.com and we’ll correct it.