Plumbers in Cardiff that AI assistants recommend

Name: AI assistant recommendations: Plumbers in Cardiff, November 2026
Creator: AIGROW
License: https://creativecommons.org/licenses/by/4.0/

Cardiff Plumbing & Heating is named most, in 31% of 36 answers.

The ranking

AI Recommendation Rate

1Cardiff Plumbing & Heating31%
95%: 18 to 47%
ChatGPT
17%
Claude
8%
Gemini
67%
Questions
3 of 4
Avg. position
1.8
Named in answers to
- Who is the best plumber in Cardiff?, from ChatGPT, Claude and Gemini
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from Gemini
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from Gemini
Also written Cardiff Plumbing & Heating Services
Is this your business?
2BVS Plumbing & Heating19%
95%: 10 to 35%
ChatGPT
0%
Claude
0%
Gemini
58%
Questions
3 of 4
Avg. position
2
Named in answers to
- Who is the best plumber in Cardiff?, from Gemini
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from Gemini
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from Gemini
Is this your business?
3Heatforce19%
95%: 10 to 35%
ChatGPT
8%
Claude
0%
Gemini
50%
Questions
3 of 4
Avg. position
2.4
Named in answers to
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from Gemini
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from Gemini
- Which plumber in Cardiff would you trust to fit a new boiler?, from ChatGPT and Gemini
Is this your business?
4Dragon Plumbing & Heating17%
95%: 8 to 32%
ChatGPT
0%
Claude
50%
Gemini
0%
Questions
3 of 4
Avg. position
2.8
Named in answers to
- Who is the best plumber in Cardiff?, from Claude
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from Claude
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from Claude
Is this your business?
5HomeServe17%
95%: 8 to 32%
ChatGPT
17%
Claude
33%
Gemini
0%
Questions
3 of 4
Avg. position
3.5
Named in answers to
- Who is the best plumber in Cardiff?, from Claude
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from Claude
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from ChatGPT and Claude
Also written HomeServe Cardiff, Homeserve Emergency Plumbers
Is this your business?
6Capital Plumbing & Heating14%
95%: 6 to 29%
ChatGPT
8%
Claude
33%
Gemini
0%
Questions
3 of 4
Avg. position
2
Named in answers to
- Who is the best plumber in Cardiff?, from Claude
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from Claude
- Which plumber in Cardiff would you trust to fit a new boiler?, from ChatGPT
Also written Capital Plumbing & Heating Cardiff
Is this your business?
7Pimlico Plumbers14%
95%: 6 to 29%
ChatGPT
8%
Claude
33%
Gemini
0%
Questions
3 of 4
Avg. position
3.2
Named in answers to
- Who is the best plumber in Cardiff?, from Claude
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from ChatGPT
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from Claude
Also written Pimlico Plumbers Cardiff
Is this your business?
8Dyno-Rod11%
95%: 4 to 25%
ChatGPT
33%
Claude
0%
Gemini
0%
Questions
2 of 4
Avg. position
1
Named in answers to
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from ChatGPT
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from ChatGPT
Also written Dyno Plumbing Cardiff
Is this your business?
9Cardiff Plumbing Services11%
95%: 4 to 25%
ChatGPT
8%
Claude
25%
Gemini
0%
Questions
2 of 4
Avg. position
2.3
Named in answers to
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from ChatGPT and Claude
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from Claude
Is this your business?
10Celtic Plumbing & Heating8%
95%: 3 to 22%
ChatGPT
8%
Claude
17%
Gemini
0%
Questions
2 of 4
Avg. position
2.3
Named in answers to
- Who is the best plumber in Cardiff?, from ChatGPT and Claude
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from Claude
Is this your business?
11Pure Plumbers Cardiff8%
95%: 3 to 22%
ChatGPT
0%
Claude
25%
Gemini
0%
Questions
2 of 4
Avg. position
2.3
Named in answers to
- Who is the best plumber in Cardiff?, from Claude
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from Claude
Is this your business?
12Aspect8%
95%: 3 to 22%
ChatGPT
25%
Claude
0%
Gemini
0%
Questions
3 of 4
Avg. position
2.7
Named in answers to
- Who is the best plumber in Cardiff?, from ChatGPT
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from ChatGPT
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from ChatGPT
Also written Aspect Plumbing & Heating Cardiff, Aspect Plumbing Cardiff
Is this your business?
13South Wales Plumbing & Heating8%
95%: 3 to 22%
ChatGPT
0%
Claude
25%
Gemini
0%
Questions
2 of 4
Avg. position
4.3
Named in answers to
- Who is the best plumber in Cardiff?, from Claude
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from Claude
Is this your business?
14BPS Plumbing & Heating6%
95%: 2 to 18%
ChatGPT
0%
Claude
0%
Gemini
17%
Questions
1 of 4
Avg. position
1
Named in answers to
- Which plumber in Cardiff would you trust to fit a new boiler?, from Gemini
Is this your business?
15Cardiff Emergency Plumbers6%
95%: 2 to 18%
ChatGPT
0%
Claude
8%
Gemini
8%
Questions
1 of 4
Avg. position
1.5
Named in answers to
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from Claude and Gemini
Is this your business?
16A&E Plumbing and Heating Cardiff6%
95%: 2 to 18%
ChatGPT
0%
Claude
0%
Gemini
17%
Questions
2 of 4
Avg. position
2
Named in answers to
- Who is the best plumber in Cardiff?, from Gemini
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from Gemini
Also written A&E Plumbing & Heating Cardiff
Is this your business?
17Cardiff Plumbers6%
95%: 2 to 18%
ChatGPT
0%
Claude
17%
Gemini
0%
Questions
1 of 4
Avg. position
2
Named in answers to
- Who is the best plumber in Cardiff?, from Claude
Also written Cardiff Plumbers Ltd
Is this your business?
18M.A.C. Plumbing & Heating6%
95%: 2 to 18%
ChatGPT
0%
Claude
0%
Gemini
17%
Questions
2 of 4
Avg. position
2
Named in answers to
- Who is the best plumber in Cardiff?, from Gemini
- I have a leaking pipe at home in Cardiff. Which plumbing company should I call?, from Gemini
Is this your business?
19Metro Rod Cardiff6%
95%: 2 to 18%
ChatGPT
0%
Claude
17%
Gemini
0%
Questions
1 of 4
Avg. position
3
Named in answers to
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from Claude
Is this your business?
20Dŵr Cymru Welsh Water6%
95%: 2 to 18%
ChatGPT
0%
Claude
17%
Gemini
0%
Questions
1 of 4
Avg. position
5
Named in answers to
- I need an emergency plumber in Cardiff tonight. Who would you recommend?, from Claude
Also written Dwr Cymru Emergency Plumbing, Dwr Cymru Welsh Water
Is this your business?

Open a row to see each assistant's share of its 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. 31 more names came up in a single answer and are counted above but not listed.

Plumbers in Cardiff: is this your field?

51different names in 36 answers, 31 of them only once. The assistants change their minds from one answer to the next.

Check whether AI names you

Is this your business?

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No business can pay to appear in the Index, rise in it or be removed from it. How the Index stays neutral

AI Visibility Index · November 2026

Asked about plumbers in Cardiff, ChatGPT, Claude and Gemini named Cardiff Plumbing & Heating most often, in 31% of answers (its AI Recommendation Rate), then BVS Plumbing & Heating (19%) and Heatforce (19%). Across 36 answers they named 51 different businesses, 31 of them only once. Each of four buyer questions was asked three times, in English, in November 2026.

The AI Recommendation Rate is the fraction of the 36 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.

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

31% of answers named Cardiff Plumbing & Heating

Answers: 36
Businesses named: 51
Named only once: 31
Named by 2+ assistants: 8 of 20
Named again on a rerun: 32%

Edition November 2026. Download the data

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.

#	ChatGPT	Claude	Gemini
1	Dyno-Rod33%	Dragon Plumbing & Heating50%	Cardiff Plumbing & Heating67%
2	Aspect25%	HomeServe33%	BVS Plumbing & Heating58%
3	Cardiff Plumbing & Heating17%	Capital Plumbing & Heating33%	Heatforce50%
4	HomeServe17%	Pimlico Plumbers33%	BPS Plumbing & Heating17%
5	Heatforce8%	Cardiff Plumbing Services25%	A&E Plumbing and Heating Cardiff17%

Claude named no business in 3 of its 12 answers.

Questions about plumbers in Cardiff

How AI assistants recommend plumbers

ChatGPT, Claude and Gemini named Cardiff Plumbing & Heating most often, in 31% of 36 answers, then BVS Plumbing & Heating (19%) and Heatforce (19%). The names come from what the assistants answered to four buyer questions in November 2026; we have not checked that any of them is good, open or real.

Not always. ChatGPT named Dyno-Rod most often (33% of its answers), Claude Dragon Plumbing & Heating (50%) and Gemini Cardiff Plumbing & Heating (67%). 8 of the 20 listed businesses were named by two or more of them.

Each question was asked three times. Of the names an assistant gave for a question, 32% came back in two or more of those runs; the rest came up once. The 95% range beside each rate in the ranking shows how far it could move by chance.

Run the free checker: it asks ChatGPT, Claude, Gemini and Grok two of the Index questions for plumbers, with the category and the place already filled in, and shows every answer word for word. About 30 seconds, no sign-up. The page on how AI assistants recommend plumbers shows what an owner can work on. Nothing can guarantee that an assistant names you.

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

<a href="https://aigrow.gg/index/plumbers/cardiff"><img src="https://aigrow.gg/badges/index/2026-11/plumbers/cardiff.svg" width="312" height="100" alt="Named by AI assistants: Plumbers in Cardiff, AIGROW AI Visibility Index, November 2026"></a>

The questions

Asked word for word, three times each, to every assistant. 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.

1Who is the best plumber in Cardiff?
2I have a leaking pipe at home in Cardiff. Which plumbing company should I call?
3I need an emergency plumber in Cardiff tonight. Who would you recommend?
4Which plumber in Cardiff would you trust to fit a new boiler?

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: 36 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.

Where the assistants look

The sites read most often, with web search on, before the assistants answer about this category in the United Kingdom. From the AI Source Map: 8 answers.

See every site for this category