AI Visibility Index: Pipe & Tube Fittings in California

When a buyer asks an AI assistant for a pipe & tube fittings supplier in California, these are the companies that get named. This is what we found when the cell was last measured.

234 companies tracked
Last measured September 30, 2026
Next measurement October 30, 2026

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The headline numbers

Never named by AI

219 of 234

companies never appeared in a single buying question

They were asked the same 5 buying questions as everyone else in this cell and were not named once.

15 named at least once
219 never named

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Cell average: 0.16of 15
Across all 234 tracked companies.
Top ten average: 4.2of 15
The ten most visible companies in the cell.

A company's score is how many of the 15 measured answers named it.

The top ten in California

These are the companies AI assistants named most often when California buyers went looking for a supplier in this category.

Top 10 most AI-visible Pipe & Tube Fittings companies in California, measured September 30, 2026
Rank	Company	Location	AI visibility
1	Stainless Distributors 23 employeesModesto, California 3 name variants Stainless Distributorsmost common7 Stainless Distributors (StainlessLab)1 Stainless Distributors, Inc.1	Modesto, California	9 of 15 answers
2	Swagelok Southern California 18 employeesSan Diego, California	San Diego, California	5 of 15 answers
3	Ace Stainless Supply California	California	5 of 15 answers
4	Turnkey Industrial Pipe & Supply 15 employeesWhittier, California	Whittier, California	4 of 15 answers
5	Installation Parts Supply California	California	4 of 15 answers
6	U.S. Metals – California Branch California	California	4 of 15 answers
7	Sani-Tech West 14 employeesCamarillo, California	Camarillo, California	3 of 15 answers
8	Crestflo California	California	3 of 15 answers
9	Stockton Pipe & Supply California	California	3 of 15 answers
10	General Industrial 6 employeesVisalia, California	Visalia, California	2 of 15 answers

42 more companies were named at least once. Companies outside the top ten are counted in the averages but not named here.

Also named, based in another state

AI assistants named these companies too, but MacRAE'S lists them in a different state, not California. They belong to that state's ranking, not this one.

Company	State	Mentions
Charman Inc.	Texas	2 of 15
Ferguson Industrial	Washington	2 of 15
United Pipe & Supply	Illinois	2 of 15
Allied Stainless (Allied Group)	Rhode Island	1 of 15
Hardware Factory Store (HFS)	Texas	1 of 15
Maverick Supply	Arkansas	1 of 15

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The five questions we asked

Every company in this cell is measured on the same questions, written the way a buyer would type them. That is what makes the ranking a comparison rather than a collection of anecdotes.

1“Best suppliers of pipe and tube fittings in California”
2“Who supplies stainless steel sanitary tri-clamp fittings in California”
3“I need a California pipe and tube fittings partner for a high-pressure chemical process line installation, who should I talk to”
4“Top pipe and tube fittings suppliers in California for industrial maintenance buyers”
5“Which California pipe and tube fittings distributors can handle large-diameter, high-pressure alloy specifications”
6“List 20 pipe and tube fittings companies in California with their specialties.”the roster question

Each question is asked more than once, which is why a company's score is out of 15 answers rather than out of the number of questions.

Where AI drew its answers from

These are the sources the answers in this cell leaned on most, ranked by how many of the named companies each one stands behind.

stainlesslab.com
3 companies
capfloww.com
3 companies
usmetals.com
3 companies
crestflousa.com
2 companies
reddit.comDirectory
2 companies
store.clearsolutionscorp.com
2 companies
swagelok.com
2 companies
generalindustrial.com
2 companies
hylokusa.com
2 companies
sani-techwest.com
2 companies
painc.com
1 company
turnkeyips.com
1 company

61 sources were cited across this cell's answers from 53 domains. A directory page often stands behind several companies at once; a company's own site usually stands behind one.

California in context

California ranks 15th of 15 measured states in this category. Each bar is the share of that state's tracked companies that AI assistants named at least once; across every measured state in this category the share is 14%.

California (this report)Other measured statesCategory average (14%)

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