Company lists · Data refreshed September 2026

Top 25 Plumbing unions worldwide

Name: Plumbing unions worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 5,008 companies tracked

RevenueBase identified 5,008 plumbing unions worldwide as of September 2026 and tracks 46,228 professional contacts across them, including 11,625 with verified work emails. The United States is the largest market and Sydney the largest hub.

This list covers plumbing unions worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026. Country and city lists for plumbing unions follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

5,008Companies

46,228Contacts tracked

11,625Verified emails

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The 25 largest plumbing unions worldwide

Ranked by team size

Top 25 of 5,008 plumbing unions worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to plumbing unions: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Hajoca Corporation	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,954 contacts →
	Indirect evidence “In 1858, one enterprising individual invested his life savings of $200 to start a business grinding key stops for plumbers in Philadelphia.” Source: RevenueBase Database · checked Sep 20, 2026
2	City Plumbing	Partial evidence	Crick, United KingdomHQ checked Sep 20, 2026	1,001-5,000	1,875 contacts →
	Partial evidence “City Plumbing has built on its reputation of selling quality products and providing expert service to the Plumbing and Heating trade for more than 25 years.” Source: RevenueBase Database · checked Sep 20, 2026
3	Wolseley Canada INC	Partial evidence	Burlington, ON, CanadaHQ checked Sep 20, 2026	1,001-5,000	1,332 contacts →
	Partial evidence “Wolseley Canada is the country’s leading national distributor of plumbing, HVAC/R and PVF products.” Source: RevenueBase Database · checked Sep 20, 2026
4	Pt. Surya Toto Indonesia TBK	Partial evidence	Jakarta, IndonesiaHQ checked Sep 20, 2026	1,001-5,000	965 contacts →
	Partial evidence “We offer a complete line of commercial and decorative plumbing fixtures and fittings, faucets, accessories, shower and flush valves, as well as lavatories, toilets, Air Baths and…” Source: RevenueBase Database · checked Sep 20, 2026
5	Tradelink	Partial evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	1,001-5,000	743 contacts →
	Partial evidence “With a network of over 200 branches across Australia and more than 150 years of industry experience, Tradelink is a trusted name in plumbing supplies.” Source: RevenueBase Database · checked Sep 20, 2026
6	Oatey Company	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 20, 2026	1,001-5,000	681 contacts →
	Partial evidence “Since 1916, Oatey has provided reliable, high-quality products for the residential and commercial plumbing industries, with a commitment to delivering quality, building trust and…” Source: RevenueBase Database · checked Sep 20, 2026
7	Plumblink	Partial evidence	Woodmead, South AfricaHQ checked Sep 20, 2026	1,001-5,000	630 contacts →
	Partial evidence “Plumblink is South Africa’s largest supplier to the plumbing industry.” Source: RevenueBase Database · checked Sep 20, 2026
8	Murphy Company	Partial evidence	St. Louis, MO, United StatesHQ checked Sep 20, 2026	1,001-5,000	579 contacts →
	Partial evidence “Per Colorado State Law Our CO Plumbing Contractor License Our Master Plumbing License is MP.03001288.” Source: RevenueBase Database · checked Sep 20, 2026
9	Charlotte Pipe And Foundry Company	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 20, 2026	1,001-5,000	560 contacts →
	Indirect evidence “For over a century Charlotte Pipe and Foundry Company has been manufacturing pipe and fittings, employing more than 1500 loyal, hard-working Americans.” Source: RevenueBase Database · checked Sep 20, 2026
10	U.S. Pipe	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 20, 2026	1,001-5,000	460 contacts →
	Indirect evidence “U.S.” Source: RevenueBase Database · checked Sep 20, 2026
11	Pan-Pacific Mechanical	Partial evidence	Fountain Valley, CA, United StatesHQ checked Sep 20, 2026	501-1,000	434 contacts →
	Partial evidence “Founded in 1947 - Pan-Pacific Mechanical, our "Mission is to be the best Plumbing and Mechanical subcontractor in California and the West by delivering exceptional customer…” Source: RevenueBase Database · checked Sep 20, 2026
12	Plumbing World	Indirect evidence	Palmerston North, New ZealandHQ checked Sep 20, 2026	501-1,000	424 contacts →
	Indirect evidence “As one of New Zealand’s largest cooperatives, we’re committed to delivering to our shareholders, our customers and our employees.” Source: RevenueBase Database · checked Sep 20, 2026
13	Southern Pipe & Supply CO	Partial evidence	Meridian, MS, United StatesHQ checked Sep 20, 2026	n/a	389 contacts →
	Partial evidence “Southern Pipe & Supply is one of the largest, privately held, independent distributors and offers the very best of brand name plumbing, heating, air-conditioning (HVAC)…” Source: RevenueBase Database · checked Sep 20, 2026
14	International Union Of Painters And Allied Trades	Partial evidence	Hanover, MD, United StatesHQ checked Sep 20, 2026	n/a	384 contacts →
	Partial evidence “The International Union of Painters and Allied Trades.” Source: RevenueBase Database · checked Sep 20, 2026
15	Eastern Industrial Supplies, INC	Indirect evidence	Greenville, SC, United StatesHQ checked Sep 20, 2026	201-500	300 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
16	Pipeliners 798	Partial evidence	Tulsa, OK, United StatesHQ checked Sep 20, 2026	51-200	250 contacts →
	Partial evidence “Pipeliners 798 is a trade union that provides the highest quality of pipeline welders to contractors across country.” Source: RevenueBase Database · checked Sep 20, 2026
17	Plumber	Partial evidence	Three Lakes, WI, United StatesHQ checked Sep 20, 2026	n/a	247 contacts →
	Partial evidence “Plumber™ exclusively serves residential and commercial plumbing contractors and franchisees providing everything from repair work and pipe rehabilitation to water conditioning and…” Source: RevenueBase Database · checked Sep 20, 2026
18	Heidenreich AS	Indirect evidence	Skedsmokorset, NorwayHQ checked Sep 20, 2026	201-500	192 contacts →
	Indirect evidence “Vi har over 30 butikker, fra Kristiansand i sør til Alta i nord.” Source: RevenueBase Database · checked Sep 20, 2026
19	Hirsch Pipe & Supply Co., INC	Partial evidence	United StatesHQ checked Sep 20, 2026	501-1,000	187 contacts →
	Partial evidence “Founded in 1933, Hirsch Pipe & Supply is a leading wholesale distributor of plumbing supplies in Southern California.” Source: RevenueBase Database · checked Sep 20, 2026
20	Wolseley Plumb Centre	Indirect evidence	Warwick, United KingdomHQ checked Sep 20, 2026	1,001-5,000	163 contacts →
	Indirect evidence “A Wolseley Business.” Source: RevenueBase Database · checked Sep 20, 2026
21	Modern Plastic Industry LLC	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 20, 2026	201-500	157 contacts →
	Indirect evidence “WHO WE ARE Modern Plastic Industry is part of Oasis Investment company, holding company of Al Shirawi Group of companies which is one of the largest and most diversified business…” Source: RevenueBase Database · checked Sep 20, 2026
22	Roto-Rooter Plumbing & Drain Service	Partial evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	n/a	154 contacts →
	Partial evidence “Trusted & Recommended since 1935, Roto-Rooter is the largest provider of plumbing and drain cleaning service in North America.” Source: RevenueBase Database · checked Sep 20, 2026
23	Mico NEW Zealand Limited	Partial evidence	Auckland, New ZealandHQ checked Sep 20, 2026	201-500	152 contacts →
	Partial evidence “Mico Plumbing & Bathrooms is part of Fletcher Building Ltd.” Source: RevenueBase Database · checked Sep 20, 2026
24	UA Plumbers And Pipefitters Local 13	Indirect evidence	United StatesHQ checked Sep 20, 2026	501-1,000	150 contacts →
	Indirect evidence “Representing Plumbers, Pipefitters and HVAC Technicians in the Rochester, NY area and 10 surrounding counties.” Source: RevenueBase Database · checked Sep 20, 2026
25	UA Local 469	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 20, 2026	1,001-5,000	148 contacts →
	Indirect evidence “UA Local 469 Plumbers and Pipefitters was chartered in 1910, two years before the State of Arizona became the 48th state.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: plumbing unions. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names plumbing unions.
Partial evidence: Its own public description names part of plumbing unions, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name plumbing unions. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 5,008 plumbing unions worldwide

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Plumbing unions worldwide at a glance

As of Sep 20, 2026

25.1%Verified-email coverage

9.2Average contacts per company

1-10Median size (employees)

1.2%Largest-city concentration · Sydney

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

2,756

11-50

1,516

51-200

456

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among plumbing unions, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for plumbing unions are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “plumbing unions”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names plumbing unions), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among plumbing unions, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 11,625 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Plumbing unions by location

12 lists · largest first

Every Plumbing unions list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Plumbing unions based in Miami, United States30

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names plumbing unions, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many plumbing unions are there worldwide?

RevenueBase identified 5,008 plumbing unions worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Hajoca Corporation, headquartered in Baton Rouge, tops this list with the largest team on record.

Which country has the most plumbing unions?

The United States leads with 2,441 companies, followed by Australia (620) and the United Kingdom (415). Every plumbing unions list by country and city is linked on this page.

Which city has the most plumbing unions?

Sydney leads with 58 headquartered companies, followed by London (51) and Melbourne (40).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 11,625 verified decision-maker contacts tracked across these 5,008 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.