Company lists · Data refreshed September 2026
Top 25 Plumbing unions based in the United States
RevenueBase identified 2,441 plumbing unions headquartered in the United States as of September 2026 and tracks 24,388 professional contacts across them, including 6,498 with verified work emails. Houston is the largest hub.
This list covers plumbing unions headquartered in the United States, 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.
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.
The 25 largest plumbing unions based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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, 2026Thanks. The Data Team will review it. | |||||
| 5 | 460 contacts → | ||||
Indirect evidence “U.S.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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, 2026Thanks. The Data Team will review it. | |||||
| 8 | 384 contacts → | ||||
Partial evidence “The International Union of Painters and Allied Trades.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 300 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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, 2026Thanks. The Data Team will review it. | |||||
| 13 | 131 contacts → | ||||
Partial evidence “In 2022, the Professional Plumbing Group (PPG) joined the Marcone Group.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 126 contacts → | ||||
Indirect evidence “Merit Brass: Connecting Your Success with Seamless Piping Solutions What does it take to keep industries flowing smoothly?” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 121 contacts → | ||||
Partial evidence “Plumbing Manufacturers International (PMI) is the trade association of plumbing product manufacturers that produce more than 90 percent of the United States’ plumbing products…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 116 contacts → | ||||
Partial evidence “Fernco, has become synonymous with not only flexible couplings, but also an ever-expanding array of innovative commercial and consumer plumbing products.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 108 contacts → | ||||
Partial evidence “Kenny Pipe & Supply is a wholesale distributor of plumbing supplies, pipe, valves and fittings headquartered in Nashville, Tennessee.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 93 contacts → | ||||
Partial evidence “Jones Stephens is a leader of rough plumbing products with a strong brand built on providing 30 years of innovation for professional contractors.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 89 contacts → | ||||
Partial evidence “Illinois-based Chicago Faucets is one of America’s most trusted names in commercial plumbing combining over a century of craftsmanship with forward-looking innovation.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 80 contacts → | ||||
Indirect evidence “Our products are built tough to withstand the rigors of professional use by plumbers & drain cleaners all day, every day.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 79 contacts → | ||||
Indirect evidence “Local 290 is an oil & energy company based out of 20210 Sw Teton Ave, Tualatin, OR, United States.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 78 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 77 contacts → | ||||
Partial evidence “Dauenhauer Plumbing is Kentucky's largest full service plumbing company, serving residential and commercial customers in both the Louisville and Lexington areas.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 73 contacts → | ||||
Partial evidence “Mr Rooter Plumbing is the leading provider of expert plumbing repair and service in the Brunswick and New Hanover County region of North Carolina.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 71 contacts → | ||||
Indirect evidence “Plumbers and Pipefitters Local 562 is a construction company based out of St.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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 2,441 plumbing unions based in the United States
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Plumbing unions based in the United States at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 2,441 companies.
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.
- What qualifies
- Companies headquartered in the United States 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. Companies headquartered outside United States are excluded even when they keep an office there.
- 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, 6,498 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 metro
- Plumbing unions in Houston31
- Plumbing unions in Miami30
- Plumbing unions in Dallas28
- Plumbing unions in New York28
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 based in the United States?
RevenueBase identified 2,441 plumbing unions headquartered in the United States 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 city has the most plumbing unions?
Houston leads with 31 headquartered companies, followed by Miami (30) and Dallas (28).
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 6,498 verified decision-maker contacts tracked across these 2,441 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.