Company lists · Data refreshed September 2026

Top 25 Building water systems companies based in Ireland

Name: Building water systems companies based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 55 companies tracked

RevenueBase identified 55 building water systems companies headquartered in Ireland as of September 2026 and tracks 1,620 professional contacts across them, including 730 with verified work emails. Dublin is the largest hub.

This list covers building water systems companies headquartered in Ireland, 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 16, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

55Companies

1,620Contacts tracked

730Verified emails

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The 25 largest building water systems companies based in Ireland

Ranked by team size

Top 25 of 55 building water systems companies based in Ireland, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to building water systems companies: 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	Ward And Burke	Indirect evidence	Kilcolgan, IrelandHQ checked Sep 16, 2026	1,001-5,000	632 contacts →
	Indirect evidence “Since its establishment, Ward & Burke has sought to develop and adopt the ideals and aspirations to civil engineering construction and currently delivers class leading, reliable…” Source: RevenueBase Database · checked Sep 16, 2026
2	Glanua	Partial evidence	Galway, IrelandHQ checked Sep 16, 2026	201-500	417 contacts →
	Partial evidence “Glanua is an industry leader in providing innovative and sustainable engineering solutions to design, build and deliver critical water and wastewater infrastructure across UK and…” Source: RevenueBase Database · checked Sep 16, 2026
3	Whitewater Group	Partial evidence	Naas, IrelandHQ checked Sep 16, 2026	201-500	131 contacts →
	Partial evidence “Whitewater Group is a multi-disciplinary engineering company with water at the heart of everything we do.” Source: RevenueBase Database · checked Sep 16, 2026
4	CULLY	Indirect evidence	Leixlip, IrelandHQ checked Sep 16, 2026	51-200	91 contacts →
	Indirect evidence “Cully Ltd.” Source: RevenueBase Database · checked Sep 16, 2026
5	Lynskey Engineering LTD	Partial evidence	Dublin 10, IrelandHQ checked Sep 16, 2026	51-200	47 contacts →
	Partial evidence “Lynskey Engineering Limited provide a wide scope of Mechanical Building Services covering commercial, industrial, process and mixed use developments.” Source: RevenueBase Database · checked Sep 16, 2026
6	Jcps Mechanical LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	40 contacts →
	Indirect evidence “JCPS Mechanical Ltd was established in 2007 by Managing Director John Corr and quickly expanded to become on of Ireland's leading Mechanical Contractors specialising in…” Source: RevenueBase Database · checked Sep 16, 2026
7	Campion	Indirect evidence	Thurles, IrelandHQ checked Sep 16, 2026	51-200	30 contacts →
	Indirect evidence “Campion is an Irish owned company that has been growing its operations since 1988.” Source: RevenueBase Database · checked Sep 16, 2026
8	M&p Mechanical	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	27 contacts →
	Indirect evidence “M&P Mechanical is a trusted, family-founded mechanical contracting company delivering high-quality, safe, and sustainable solutions across Ireland and beyond.” Source: RevenueBase Database · checked Sep 16, 2026
9	Cantwell Electrical Engineering LTD	Partial evidence	Thurles, IrelandHQ checked Sep 16, 2026	51-200	18 contacts →
	Partial evidence “We are one of Ireland’s leading Water Treatment and Pumping Solutions providers.” Source: RevenueBase Database · checked Sep 16, 2026
10	Coftec	Partial evidence	Athenry, IrelandHQ checked Sep 16, 2026	51-200	17 contacts →
	Partial evidence “Coftec design, build, install & commission innovative, customised, engineering solutions for the water services industry.” Source: RevenueBase Database · checked Sep 16, 2026
11	Conway Engineering	Indirect evidence	Limerick, IrelandHQ checked Sep 16, 2026	11-50	14 contacts →
	Indirect evidence “Conway Engineering have been in operation for over 40 years specialising in the design, manufacture and installation of mechanical and electrical engineering solutions to meet…” Source: RevenueBase Database · checked Sep 16, 2026
12	Biocycle Wastewater Treatment Systems	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	11 contacts →
	Indirect evidence “For over 20 years bioCycle™ has been at the forefront of the wastewater industry in Ireland.” Source: RevenueBase Database · checked Sep 16, 2026
13	Celtic Water Solutions	Partial evidence	IrelandHQ checked Sep 16, 2026	11-50	8 contacts →
	Partial evidence “Celtic Water Solutions is a leading provider of water treatment and hygiene solutions, offering a broad portfolio of products, services and expertise to support residential…” Source: RevenueBase Database · checked Sep 16, 2026
14	Walsh & Sheehan LTD	Indirect evidence	Co. Kilkenny, IrelandHQ checked Sep 16, 2026	11-50	7 contacts →
	Indirect evidence “Walsh & Sheehan Ltd was founded in 2001 by Business Partners Owen Sheehan and Brian Walsh.” Source: RevenueBase Database · checked Sep 16, 2026
15	Renewell Water	Partial evidence	Dundalk, IrelandHQ checked Sep 16, 2026	11-50	7 contacts →
	Partial evidence “Founded in 2002, Renewell Water has been a trusted provider of healthy water solutions in Ireland for over two decades.” Source: RevenueBase Database · checked Sep 16, 2026
16	Foley's Plumbing	Indirect evidence	Cork, IrelandHQ checked Sep 16, 2026	1-10	7 contacts →
	Indirect evidence “Foleys Plumbing is Cork’s leading plumber.” Source: RevenueBase Database · checked Sep 16, 2026
17	Henderson Piping	Indirect evidence	Limerick, IrelandHQ checked Sep 16, 2026	11-50	6 contacts →
	Indirect evidence “Henderson Piping Ltd is an Irish owned Company based in county Limerick.” Source: RevenueBase Database · checked Sep 16, 2026
18	Charles Mccarthy Plumbing LTD	Indirect evidence	Cork, IrelandHQ checked Sep 16, 2026	11-50	6 contacts →
	Indirect evidence “Charles McCarthy Plumbers have been working in Cork City since 1881.” Source: RevenueBase Database · checked Sep 16, 2026
19	Glenngorey Pumps	Strong evidence	Naas, IrelandHQ checked Sep 16, 2026	1-10	5 contacts →
	Strong evidence “We sell, service and install water pumps, water treatment, sewage treatment and rainwater harvesting systems.” Source: RevenueBase Database · checked Sep 16, 2026
20	Ireland Waste Water	Strong evidence	Co Cork, IrelandHQ checked Sep 16, 2026	11-50	4 contacts →
	Strong evidence “Ireland Waste Water is a private company that designs, manufactures, installs and services precast concrete wastewater treatment systems as well as its latest innovation - the…” Source: RevenueBase Database · checked Sep 16, 2026
21	NOC Heating And Plumbing LTD	Indirect evidence	Co. Kerry, IrelandHQ checked Sep 16, 2026	11-50	4 contacts →
	Indirect evidence “Since our formation in 2003, NOC Heating & Plumbing Ltd has grown steadily and has completed projects across all sectors of the industry.” Source: RevenueBase Database · checked Sep 16, 2026
22	ONA Water Ireland	Partial evidence	Nenagh, IrelandHQ checked Sep 16, 2026	1-10	4 contacts →
	Partial evidence “Welcome to ONA Water Ireland, where sustainability and design elegantly combine to transform your everyday hydration experience.” Source: RevenueBase Database · checked Sep 16, 2026
23	Greene Drainage Solutions	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	1-10	2 contacts →
	Indirect evidence “Greene Drainage Solutions was formed by Tim Greene in 2023 in order to provide exceptional customer service nationwide.” Source: RevenueBase Database · checked Sep 16, 2026
24	Waterways Environmental LTD	Partial evidence	Balbriggan, IrelandHQ checked Sep 16, 2026	1-10	2 contacts →
	Partial evidence “Our systems include rainwater harvesting, siphonic and hdpe pipework roof drainage systems, stainless steel drainage, pumping stations, wastewater treatment and other items such…” Source: RevenueBase Database · checked Sep 16, 2026
25	24 Hour Plumber	Indirect evidence	Navan, IrelandHQ checked Sep 16, 2026	1-10	2 contacts →
	Indirect evidence “24 Hour Plumber offers a range of installation, repair, and maintenance to domestic homeowners and commercial businesses.” Source: RevenueBase Database · checked Sep 16, 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: building water systems companies. 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 building water systems companies.
Partial evidence: Its own public description names part of building water systems companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name building water systems companies. 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 55 building water systems companies based in Ireland

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Building water systems companies based in Ireland at a glance

As of Sep 16, 2026

45.1%Verified-email coverage

29.5Average contacts per company

11-50Median size (employees)

16.4%Largest-city concentration · Dublin

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 55 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 building water systems companies, 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 Ireland whose own description of what they do matches “building water systems companies”. 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 building water systems companies), 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 building water systems companies, and records with no verified work email. Companies headquartered outside Ireland 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, 730 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 16, 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.

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 building water systems companies, 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 building water systems companies are there based in Ireland?

RevenueBase identified 55 building water systems companies headquartered in Ireland 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?

Ward And Burke, headquartered in Kilcolgan Kilcolgan, tops this list with the largest team on record.

Which city has the most building water systems companies?

Dublin leads with 9 headquartered companies, followed by Dundalk (2) and Limerick (2).

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 730 verified decision-maker contacts tracked across these 55 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 16, 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.