Company lists · Data refreshed October 2026

Top 25 Commercial water system contractors based in the United Kingdom

Name: Commercial water system contractors based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 10, 2026 174 companies tracked

RevenueBase identified 174 company matches for commercial water system contractors associated with the United Kingdom as of October 2026 and tracks 1,769 professional contacts across them, including 689 with verified work emails. London is the largest hub.

This list covers company matches for commercial water system contractors associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 10, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 10, 2026 How this list was built

174Companies

1,769Contacts tracked

689Verified emails

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The 25 largest commercial water system contractors based in the United Kingdom

Ranked by team size

Top 25 of 174 company matches for commercial water system contractors based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Severn Trent Services	Exact match	Coventry, United KingdomHQ recorded Oct 10, 2026	1,001-5,000	147 contacts →
	Exact match “Severn Trent Services offer a range of services to municipal and industrial clients, including the Ministry of Defence and the Coal Authority, for design, build and operation of…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2	Alumasc Water Management Solutions	Exact match	Kettering, United KingdomHQ recorded Oct 10, 2026	51-200	123 contacts →
	Exact match “AWMS, part of Alumasc Group, is the first joined-up brand in integrated water management.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
3	Siltbuster LTD	Exact match	Monmouth, United KingdomHQ recorded Oct 10, 2026	51-200	83 contacts →
	Exact match “At Siltbuster Ltd, we operate the UK’s largest rental fleet of water treatment systems, setting the industry benchmark for rapid, reliable, and cost-effective solutions.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4	J A Brooks	Exact match	London, United KingdomHQ recorded Oct 10, 2026	201-500	62 contacts →
	Exact match “J A Brooks was established in 1925 and has a long history in the delivery of Public health and Water services in the London and South East and hold an excellent reputation as one…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5	Ashford Environmental Services Limited	Exact match	Ashford, United KingdomHQ recorded Oct 10, 2026	51-200	59 contacts →
	Exact match “Welcome to Ashford Environmental Services Limited, the UK's leading building services commissioning and water treatment specialist, providing a fully integrated service to…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
6	Hydrotec Water Treatment Specialists	Exact match	High Wycombe, United KingdomHQ recorded Oct 10, 2026	51-200	54 contacts →
	Exact match “Hydrotec is the UK’s leading company in the design and manufacture of water treatment products for the building services industry.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7	Guardian Water Treatment Marlowe Environmental Services	Exact match	Basildon, United KingdomHQ recorded Oct 10, 2026	51-200	43 contacts →
	Exact match “Guardian part of Marlowe Environmental Services, delivers a range of water treatment and air quality services, allowing the systems that rely on these elements to work effectively…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8	Billi UK	Exact match	Wolverhampton, United KingdomHQ recorded Oct 10, 2026	51-200	41 contacts →
	Exact match “At Billi, we design and manufacture a range of energy efficient filtered water systems that offer our customers the very best in innovation, superior performance and reliability.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
9	Lubron UK	Exact match	Colchester, United KingdomHQ recorded Oct 10, 2026	51-200	30 contacts →
	Exact match “Lubron Water Technology UK is part of the European Market leading water treatment provider, Lubron Group, which has subsidiaries in the Netherlands, Germany and Belgium.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10	Retroflo	Exact match	Seaham, United KingdomHQ recorded Oct 10, 2026	11-50	30 contacts →
	Exact match “Based in the North East of England, Retroflo Ltd are an Electrical and Mechanical contractor whose main activities are focused in the water industry.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
11	Panks Engineers LTD	Exact match	Norwich, United KingdomHQ recorded Oct 10, 2026	51-200	30 contacts →
	Exact match “Established in 1842, Panks supply, install, maintain, repair and service pumps and pump systems, including all ancillary equipment such as pipes, valves, fittings, controls etc.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
12	Priory	Exact match	Whyteleafe, United KingdomHQ recorded Oct 10, 2026	51-200	30 contacts →
	Exact match “Priory Mechanical Services Limited, established in 1973 as a family run company providing high quality design, installation and maintenance in all aspects of Building Services.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
13	JH Mechanical & Electrical	Exact match	Stockton-on-tees, United KingdomHQ recorded Oct 10, 2026	11-50	29 contacts →
	Exact match “JH Mechanical Services is a leading provider of mechanical, electrical and water management services across the North of England.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14	Huttie Building Services	Exact match	Cambridge, United KingdomHQ recorded Oct 10, 2026	11-50	28 contacts →
	Exact match “Huttie group was founded in 2007 and provides full commercial and residential plumbing, heating and electrical services - Commercial: For every business and building type, you…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15	Smoothflow Water Treatment & Commissioning	Exact match	Rickmansworth, United KingdomHQ recorded Oct 10, 2026	51-200	23 contacts →
	Exact match “Smoothflow have been setting benchmark standards since our inception in 1992 and has grown into one of the most highly regarded providers of water treatment, commissioning &…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
16	Innovation AIR Conditioning And Building Services Limited	Exact match	Croydon, United KingdomHQ recorded Oct 10, 2026	11-50	22 contacts →
	Exact match “Innovation is a privately owned company formed in 1998 and has successfully traded in the Building Services Sector of the Construction Industry since its inception.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	Excel Water LTD	Exact match	Castleford, United KingdomHQ recorded Oct 10, 2026	11-50	22 contacts →
	Exact match “At Excel Water, we pride ourselves on our unwavering commitment to delivering exceptional water treatment and purification solutions tailored to the diverse needs of our clients.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18	Mellor Bromley Mechanical Services	Exact match	Leicester, United KingdomHQ recorded Oct 10, 2026	51-200	21 contacts →
	Exact match “Mellor Bromley has a vast wealth of experience and expertise in the design and installation of Mechanical Services (heating, cooling, air conditioning, ventilation, water plumbing…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19	Waterscapes Limited	Exact match	Wincanton, United KingdomHQ recorded Oct 10, 2026	11-50	18 contacts →
	Exact match “As leading water feature and irrigation specialists we can offer you a complete package from design through to maintenance or any component within.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20	Ocmis LTD	Exact match	Martock, United KingdomHQ recorded Oct 10, 2026	11-50	14 contacts →
	Exact match “Ocmis have a pedigree in the design and installation of high quality Water Features, Fountains and Irrigation Systems.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21	Ecopure Waters	Exact match	Buckinghamshire, United KingdomHQ recorded Oct 10, 2026	11-50	14 contacts →
	Exact match “Your water.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
22	Kebble Environmental Services	Exact match	Harlow, United KingdomHQ recorded Oct 10, 2026	11-50	13 contacts →
	Exact match “We aim to be the most innovative, professional, Commissioning and Water Treatment service provider within the building services sector.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23	Waterwise Utilities LTD	Exact match	Clydebank, United KingdomHQ recorded Oct 10, 2026	11-50	12 contacts →
	Exact match “WaterWise Utilities Ltd is an LRQA-accredited utility infrastructure contractor delivering high-quality water, electrical and traffic management solutions across Scotland.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24	Fountains Direct LTD	Exact match	Weybridge, United KingdomHQ recorded Oct 10, 2026	11-50	11 contacts →
	Exact match “Fountains Direct Limited’s strength lies in the depth of experience of its team and the quality of the products with which it works.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25	Fulcom LTD	Exact match	Cardiff, United KingdomHQ recorded Oct 10, 2026	11-50	11 contacts →
	Exact match “Fulcom is a reputed and trusted provider of Commissioning & Water Treatment services to the Building Services industry.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “commercial water system contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 174 commercial water system contractors based in the United Kingdom

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Commercial water system contractors based in the United Kingdom at a glance

As of Oct 10, 2026

38.9%Verified-email coverage

10.2Average contacts per company

11-50Median size (employees)

6.9%Largest-city concentration · London

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 174 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “commercial water system contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 689 professional contacts with verified work emails across the full matched dataset. 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 October 10, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “commercial water system contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial water system contractors are there based in the United Kingdom?

RevenueBase identified 174 company matches for commercial water system contractors associated with the United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Severn Trent Services tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most commercial water system contractors?

London leads with 12 company records, followed by Manchester (5) and Leicester (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 689 professional contacts with verified work emails tracked across these 174 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 10, 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 SmartSearch, 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.