Company lists · Data refreshed September 2026

Top 25 Water system maintenance contractors based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 317 companies tracked

RevenueBase identified 317 water system maintenance contractors headquartered in the United Kingdom as of September 2026 and tracks 5,862 professional contacts across them, including 1,714 with verified work emails. London is the largest hub.

This list covers water system maintenance contractors headquartered in the United Kingdom, 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 19, 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 19, 2026 86% judged on-target in blind review

317Companies

5,862Contacts tracked

1,714Verified emails

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

Ranked by team size

Top 25 of 317 water system maintenance contractors based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to water system maintenance contractors: 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	Lanes Group	Partial evidence	Leeds, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,219 contacts →
	Partial evidence “Lanes Group is a leading provider of specialist drainage, utility, and asset maintenance services.” Source: RevenueBase Database · checked Sep 19, 2026
2	Team, Inc. Uk, Africa, Caspian	Partial evidence	Kendal, United KingdomHQ checked Sep 19, 2026	201-500	455 contacts →
	Partial evidence “TEAM is a leading industrial services company offering an array of specialized services related to the construction, maintenance, and monitoring of pressurized piping and…” Source: RevenueBase Database · checked Sep 19, 2026
3	Sapphire Utility Solutions LTD	Indirect evidence	Bamber Bridge, United KingdomHQ checked Sep 19, 2026	1,001-5,000	324 contacts →
	Indirect evidence “Sapphire Utility Solutions has quickly become a trusted name in the utility, transport and highways sectors, known for our capabilities in delivering innovative solutions to meet…” Source: RevenueBase Database · checked Sep 19, 2026
4	Enterprise PLC	Indirect evidence	Leyland, United KingdomHQ checked Sep 19, 2026	10001+	306 contacts →
	Indirect evidence “Enterprise was acquired by Amey in 2013, please visit http://ow.ly/KxJYY to view all the latest news and job alerts from Amey.” Source: RevenueBase Database · checked Sep 19, 2026
5	Onsite Central Limited	Indirect evidence	Worcester, United KingdomHQ checked Sep 19, 2026	201-500	178 contacts →
	Indirect evidence “Originally established in 1977, OnSite is a South Staffordshire Group owned company that has grown through strategic acquisition and organic expansion to become one of the UK's…” Source: RevenueBase Database · checked Sep 19, 2026
6	Hydrosave UK LTD	Strong evidence	Kettering, United KingdomHQ checked Sep 19, 2026	201-500	164 contacts →
	Strong evidence “We are a leading specialist pipeline inspection, leak detection, valve maintenance and water audit company.” Source: RevenueBase Database · checked Sep 19, 2026
7	Utilitec Services	Partial evidence	Wirksworth, United KingdomHQ checked Sep 19, 2026	201-500	162 contacts →
	Partial evidence “Utilitec Services have provided niche operational support to the UK Water and Gas Industry since 1997.” Source: RevenueBase Database · checked Sep 19, 2026
8	Severn Trent Services	Indirect evidence	Coventry, United KingdomHQ checked Sep 19, 2026	1,001-5,000	137 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
9	Metcor Environmental	Indirect evidence	Gravesend, United KingdomHQ checked Sep 19, 2026	51-200	86 contacts →
	Indirect evidence “Metcor Environmental is one of the UK’s leading commercial drainage, plumbing and pump engineering firms.” Source: RevenueBase Database · checked Sep 19, 2026
10	GEL Engineering	Indirect evidence	Enfield, United KingdomHQ checked Sep 19, 2026	51-200	70 contacts →
	Indirect evidence “Welcome to Gel Engineering.” Source: RevenueBase Database · checked Sep 19, 2026
11	IWS Mechanical & Electrical	Strong evidence	Walsall, United KingdomHQ checked Sep 19, 2026	51-200	68 contacts →
	Strong evidence “Integrated Water Services M&E is an established Principle Contractor and Designer within the MEICA Process sector, specialising in pump diagnostics and refurbishment, turn-key…” Source: RevenueBase Database · checked Sep 19, 2026
12	Glanville Environmental	Partial evidence	Ivybridge, United KingdomHQ checked Sep 19, 2026	201-500	64 contacts →
	Partial evidence “Glanville Environmental help commercial infrastructure owners reduce pollution and flood risk by inspecting and maintaining ageing drainage systems and installing new…” Source: RevenueBase Database · checked Sep 19, 2026
13	Willow Pumps Limited	Partial evidence	Kent, United KingdomHQ checked Sep 19, 2026	51-200	63 contacts →
	Partial evidence “Willow Pumps provide expert services for all your pump, drainage, waste and clean water needs.” Source: RevenueBase Database · checked Sep 19, 2026
14	MKE Engineering Group	Indirect evidence	Sittingbourne, United KingdomHQ checked Sep 19, 2026	51-200	63 contacts →
	Indirect evidence “MKE Engineering (Mid Kent Electrical) is the largest independent engineering service provider of its kind in the South East, operating from 3 different sites covering Kent…” Source: RevenueBase Database · checked Sep 19, 2026
15	Deritend	Partial evidence	Wolverhampton, United KingdomHQ checked Sep 19, 2026	51-200	58 contacts →
	Partial evidence “We are one of the UK’s fastest growing in and most dynamic maintenance services organisations, encompassing several specialist engineering operations within the group.” Source: RevenueBase Database · checked Sep 19, 2026
16	J A Brooks	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	55 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
17	Guardian Water Treatment Marlowe Environmental Services	Strong evidence	Basildon, United KingdomHQ checked Sep 19, 2026	51-200	50 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
18	T-T Pumps LTD	Indirect evidence	Woore, United KingdomHQ checked Sep 19, 2026	51-200	49 contacts →
	Indirect evidence “Established in 1959, T-T started out as a general engineering company before growing to consist of 6 divisions – T-T Pumps, T-T Controls and Automation, T-T Flow Valves, T-T…” Source: RevenueBase Database · checked Sep 19, 2026
19	Hydro International UK Wastewater Services	Partial evidence	Portland, United KingdomHQ checked Sep 19, 2026	201-500	45 contacts →
	Partial evidence “Hydro International, a CRH Company, provides advanced products, services and expertise to help municipal, industrial and construction customers to improve their water management…” Source: RevenueBase Database · checked Sep 19, 2026
20	Plumbing & GAS Solutions LTD	Partial evidence	Milton Keynes, United KingdomHQ checked Sep 19, 2026	11-50	41 contacts →
	Partial evidence “Plumbing & Gas Solutions Ltd are a Constructionline and CHAS accredited Commercial Plumbing & Heating contractor based in Milton Keynes.” Source: RevenueBase Database · checked Sep 19, 2026
21	Veriflo Limited	Partial evidence	East Malling, United KingdomHQ checked Sep 19, 2026	11-50	39 contacts →
	Partial evidence “Veriflo Ltd - a professional strategic project management company, specialising in clean water asset services.” Source: RevenueBase Database · checked Sep 19, 2026
22	Synthotech Limited	Partial evidence	Harrogate, United KingdomHQ checked Sep 19, 2026	11-50	36 contacts →
	Partial evidence “Leading the way in innovative engineering solutions for the global utility market, including in-pipe CCTV systems, leak detection, and in-pipe robotics.” Source: RevenueBase Database · checked Sep 19, 2026
23	Panton Mcleod	Strong evidence	Selkirk, United KingdomHQ checked Sep 19, 2026	11-50	35 contacts →
	Strong evidence “Our teams are dedicated to supporting our clients to protect, maintain and improve water quality within treatment and distribution systems.” Source: RevenueBase Database · checked Sep 19, 2026
24	Servitech International Limited	Strong evidence	Wilstead, United KingdomHQ checked Sep 19, 2026	51-200	34 contacts →
	Strong evidence “Servitech International is a privately owned, independant company that has been providing maintenance, support, supply and installation services for all water, waste water and…” Source: RevenueBase Database · checked Sep 19, 2026
25	Aquam Water Services	Partial evidence	Derby, United KingdomHQ checked Sep 19, 2026	51-200	32 contacts →
	Partial evidence “Aquam Corporation provides pipeline infrastructure services and technologies to owners and operators of water and gas networks.” Source: RevenueBase Database · checked Sep 19, 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: water system maintenance contractors. 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 water system maintenance contractors.
Partial evidence: Its own public description names part of water system maintenance contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water system maintenance contractors. 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 317 water system maintenance contractors based in the United Kingdom

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Water system maintenance contractors based in the United Kingdom at a glance

As of Sep 19, 2026

29.2%Verified-email coverage

18.5Average contacts per company

11-50Median size (employees)

6.0%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

138

11-50

119

51-200

201-500

501-1,000

1,001-5,000

10001+

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 317 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 water system maintenance contractors, 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 Kingdom whose own description of what they do matches “water system maintenance contractors”. 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 water system maintenance contractors), 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 water system maintenance contractors, and records with no verified work email. Companies headquartered outside United Kingdom 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, 1,714 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 19, 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 water system maintenance contractors, 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 water system maintenance contractors are there based in the United Kingdom?

RevenueBase identified 317 water system maintenance contractors headquartered in the United Kingdom 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?

Lanes Group, headquartered in Leeds, tops this list with the largest team on record.

Which city has the most water system maintenance contractors?

London leads with 19 headquartered companies, followed by Leeds (6) and Rotherham (6).

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 1,714 verified decision-maker contacts tracked across these 317 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 19, 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.