Company lists · Data refreshed September 2026

Top 25 Sewer contractors based in the United Kingdom

Name: Sewer 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 17, 2026 382 companies tracked

RevenueBase identified 382 sewer contractors headquartered in the United Kingdom as of September 2026 and tracks 2,737 professional contacts across them, including 833 with verified work emails. London is the largest hub.

This list covers sewer 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 17, 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 17, 2026 86% judged on-target in blind review

382Companies

2,737Contacts tracked

833Verified emails

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The 25 largest sewer contractors based in the United Kingdom

Ranked by team size

Top 25 of 382 sewer contractors based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to sewer 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	Onsite Central Limited	Indirect evidence	Worcester, United KingdomHQ checked Sep 17, 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 17, 2026
2	Envolve Infrastructure	Indirect evidence	Cardiff Road, United KingdomHQ checked Sep 17, 2026	201-500	136 contacts →
	Indirect evidence “We’re envolve, specialist civil engineers.” Source: RevenueBase Database · checked Sep 17, 2026
3	Steve Vick International LTD	Indirect evidence	Bradford On Avon, United KingdomHQ checked Sep 17, 2026	51-200	59 contacts →
	Indirect evidence “Steve Vick International was founded in 1981 by the current chairman, Steve Vick, who saw an opportunity to develop ways of safely sealing off gas mains and services using…” Source: RevenueBase Database · checked Sep 17, 2026
4	J A Brooks	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	55 contacts →
	Indirect 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 17, 2026
5	Eurogold Groundworks & Civil Engineering Contractors LTD	Partial evidence	Liverpool, United KingdomHQ checked Sep 17, 2026	51-200	53 contacts →
	Partial evidence “Eurogold Groundworks & Civil Engineering Contractors LTD are established as one of the premier civil engineering groundworks contractors in the north west region.” Source: RevenueBase Database · checked Sep 17, 2026
6	Drainline LTD	Partial evidence	Sayers Common, United KingdomHQ checked Sep 17, 2026	51-200	52 contacts →
	Partial evidence “DrainLine Ltd caters for all types of drainage works – from a blockage in a small diameter line to the rehabilitation of a main line sewers, both foul and storm.” Source: RevenueBase Database · checked Sep 17, 2026
7	BSG	Partial evidence	Maghera, United KingdomHQ checked Sep 17, 2026	51-200	49 contacts →
	Partial evidence “With over 40 year’s industry experience, we are a leading engineering contractor with specialist expertise in the water and wastewater sector.” Source: RevenueBase Database · checked Sep 17, 2026
8	Biomarsh Environmental LTD Part Of Drains Direct UK Group	Indirect evidence	Waltham Abbey, United KingdomHQ checked Sep 17, 2026	51-200	47 contacts →
	Indirect evidence “Founded in 1972, BioMarsh has grown to be one of the leading companies in its field.” Source: RevenueBase Database · checked Sep 17, 2026
9	Dalrod UK	Partial evidence	Peterborough, United KingdomHQ checked Sep 17, 2026	51-200	39 contacts →
	Partial evidence “DALROD offer specialist drain cleaning, CCTV drain surveys, drain relining, sewer renovation and pump maintenance solutions, with a 24/7 emergency service.” Source: RevenueBase Database · checked Sep 17, 2026
10	NRC WWS LTD	Partial evidence	Wirral, United KingdomHQ checked Sep 17, 2026	11-50	26 contacts →
	Partial evidence “At NRC WWS, we are commercial drainage contractors that offer a range of solutions including planned maintenance and 24-hour contract cover.” Source: RevenueBase Database · checked Sep 17, 2026
11	Environmental Techniques	Indirect evidence	Lisburn, United KingdomHQ checked Sep 17, 2026	51-200	26 contacts →
	Indirect evidence “Environmental Techniques was established in 1992 to provide trenchless drainage inspection, cleaning and rehabilitation throughout the United Kingdom and Ireland, with offices in…” Source: RevenueBase Database · checked Sep 17, 2026
12	Retroflo	Partial evidence	Seaham, United KingdomHQ checked Sep 17, 2026	11-50	25 contacts →
	Partial evidence “Based in the North East of England, Retroflo Ltd are an Electrical and Mechanical contractor whose main activities are focused in the water industry.” Source: RevenueBase Database · checked Sep 17, 2026
13	Lining Division Limited	Indirect evidence	Saint Leonards, United KingdomHQ checked Sep 17, 2026	11-50	25 contacts →
	Indirect evidence “Lining Division Ltd, a Vortex company, is a trenchless solutions provider for the wastewater industry.” Source: RevenueBase Database · checked Sep 17, 2026
14	Ukdn Waterflow LG LTD	Indirect evidence	Birmingham, United KingdomHQ checked Sep 17, 2026	201-500	24 contacts →
	Indirect evidence “UKDN Waterflow (LG) Ltd – Respond \| Report \| Repair As of November 2015 UKDN Waterflow (LG) Ltd was acquired by Lanes Group plc the Largest wholly owned UK Drainage solution…” Source: RevenueBase Database · checked Sep 17, 2026
15	Lanes Group PLC	Indirect evidence	Leeds, United KingdomHQ checked Sep 17, 2026	1,001-5,000	22 contacts →
	Indirect evidence “Lanes Group is more than a wastewater solutions provider.” Source: RevenueBase Database · checked Sep 17, 2026
16	Cotterills	Indirect evidence	Sutton Coldfield, United KingdomHQ checked Sep 17, 2026	11-50	21 contacts →
	Indirect evidence “At Cotterills, we’re all about doing right by people and we’ve been doing it for over 30 years.” Source: RevenueBase Database · checked Sep 17, 2026
17	Exjet Services	Partial evidence	Paignton, United KingdomHQ checked Sep 17, 2026	11-50	21 contacts →
	Partial evidence “Exjet Services are one of the UK’s premier specialist drainage engineering, surveying, cleansing and sewer rehabilitation companies.” Source: RevenueBase Database · checked Sep 17, 2026
18	Mcbreen Enviro UK	Partial evidence	Depots: Warrington, United KingdomHQ checked Sep 17, 2026	51-200	20 contacts →
	Partial evidence “Welcome to McBreen Enviro UK, part of the McBreen Group, we bring over 19 years of expertise in trenchless repairs, sewer robotics, drainage and environmental services to deliver…” Source: RevenueBase Database · checked Sep 17, 2026
19	24hr Aquaflow Services Limited	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	20 contacts →
	Indirect evidence “We deliver plumbing, pump and drainage solutions 24 hours a day, seven days a week.” Source: RevenueBase Database · checked Sep 17, 2026
20	GEE DEE Plant	Indirect evidence	Seaton Carew, United KingdomHQ checked Sep 17, 2026	11-50	20 contacts →
	Indirect evidence “Offering drainage solutions - Interceptor & Septic Tank Cleaning - Drain CCTV - Drain Rehabilitation Operating since 1985 and based on a 3/4 acre site on Hartlepool's Graythorp…” Source: RevenueBase Database · checked Sep 17, 2026
21	Aquaflow Services London S Plumbing & Drainage Experts	Partial evidence	Canterbury, United KingdomHQ checked Sep 17, 2026	11-50	19 contacts →
	Partial evidence “At Aquaflow, we are trusted plumbing and drainage contractors, specialising in utility system solutions for commercial, facilities, and industrial clients across London and…” Source: RevenueBase Database · checked Sep 17, 2026
22	United Drains	Indirect evidence	Ongar, United KingdomHQ checked Sep 17, 2026	51-200	19 contacts →
	Indirect evidence “United Drains Ltd, offer both Drainage & Plumbing services NATIONWIDE.” Source: RevenueBase Database · checked Sep 17, 2026
23	Wilkinson Environmental LTD	Indirect evidence	Atherstone, United KingdomHQ checked Sep 17, 2026	11-50	19 contacts →
	Indirect evidence “Operating out of Atherstone, Warwickshire in The Midlands we have a forward-thinking management team with over 30 years’ experience in the drainage services and civil engineering…” Source: RevenueBase Database · checked Sep 17, 2026
24	Birmingham Drain Services	Indirect evidence	Birmingham, United KingdomHQ checked Sep 17, 2026	11-50	19 contacts →
	Indirect evidence “Birmingham Drain Services: Part of The Drain Group Founded in 2008, Birmingham Drain Services has established itself as a trusted leader in drainage solutions.” Source: RevenueBase Database · checked Sep 17, 2026
25	IRM Group	Indirect evidence	Bradford, United KingdomHQ checked Sep 17, 2026	51-200	18 contacts →
	Indirect evidence “Welcome to IRM Group, your trusted partner for all drainage solutions.” Source: RevenueBase Database · checked Sep 17, 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: sewer 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 sewer contractors.
Partial evidence: Its own public description names part of sewer contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sewer 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 382 sewer contractors based in the United Kingdom

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Sewer contractors based in the United Kingdom at a glance

As of Sep 17, 2026

30.4%Verified-email coverage

7.2Average contacts per company

11-50Median size (employees)

3.7%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

180

11-50

141

51-200

201-500

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 382 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 sewer 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 “sewer 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 sewer 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 sewer 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, 833 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 17, 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 sewer 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 sewer contractors are there based in the United Kingdom?

RevenueBase identified 382 sewer 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?

Onsite Central Limited, headquartered in Worcester, tops this list with the largest team on record.

Which city has the most sewer contractors?

London leads with 14 headquartered companies, followed by Birmingham (5) and Colchester (5).

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 833 verified decision-maker contacts tracked across these 382 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 17, 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.