What Marsh Industries Ltd does

Marsh Industries Ltd is a UK-based private manufacturer of off-mains wastewater treatment and drainage products, headquartered in Irthlingborough, Northamptonshire. The company designs and fabricates sewage treatment plants, septic tanks, pump stations, grease traps, oil separators, silage effluent tanks, and stormwater attenuation systems, serving domestic, commercial, agricultural, and leisure/holiday site customers across the UK and Europe. Its product portfolio is structured as a platform-plus-modules architecture: the Ensign range (Standard, Ultra, and shallow-dig variants including the 1.6m Ensign-EL) forms the core sewage treatment platform, supporting 4 to 50+ population equivalent capacities, while the Marsh Natural Solutions sub-brand wraps Nutra-Lite SBR, Phos-Lite, Marsh Gemini, and Aqua-Puratine into a chemical-free nutrient removal platform targeting nutrient neutrality requirements.

Underlying technology centres on Sequential Batch Reactor (SBR) biological treatment, aerobic extended aeration, and a proprietary adsorption process for phosphate removal that binds phosphorus to naturally occurring media without chemical dosing. The company manufactures in glass reinforced plastic (GRP), claiming a 40% strength advantage over competitors through impact testing, with EN ISO 11925-2:2010 fire resistance compliance. Products are certified to EN12566-3 Annex B, BSEN12566-3/A1:2009, and carry CE marking, with wastewater performance metrics including 95.6% BOD removal, ammonia to 1 mg/l, and 97% pollutant removal on tested units.

Marsh operates a sales-led, quote-based go-to-market through two channels: an extensive UK merchant network for specification and purchase, and direct phone/email enterprise sales for commercial projects with BIM/CAD support. Revenue is generated from one-time hardware sales of treatment plants and ancillary products, supplemented by project management and bespoke design services (Gaia Sege). The company has 38 employees, no disclosed funding or external institutional ownership, and a sub-brand portfolio spanning ten trademarked product lines.

Name

Marsh Industries Ltd

Legal name

Marsh Industries Limited

Website

https://marshindustries.co.uk

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Marsh Industries Ltd is a UK manufacturer of off-mains wastewater treatment plants, septic tanks, and pump stations, serving domestic, commercial, agricultural, and leisure customers through a merchant network and direct sales.

Ownership category

akta.pro rank

Product category

Wastewater Treatment Equipment

NAICS

Sewage Treatment Facilities (22132)

SIC

Sanitary Services (4950), Refuse Systems (4953)

akta.pro primary industry

Advanced/Nutrient Removal (BNR/ENR: N, P) (EUANADAC)

akta.pro secondary industry

Filtration & Water Treatment for Irrigation (Sand/Disc/Screen, Chem Treatment) (AFAAACAD)

Keywords

• Sewage treatment plants
• Wastewater management
• Septic tank conversion
• Pump stations
• Rainwater harvesting

Headquarters

HQ city

Irthlingborough

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Wastewater Treatment Products: One-time sales of sewage treatment plants, septic tanks, pump stations, and ancillary products to domestic, commercial, agricultural, and leisure customers. Products include packaged treatment plants, cesspools, grease traps, oil separators, and specialized natural solutions for phosphate/nitrate removal.
2. Ancillary Products and Accessories: Sales of complementary products including Whisspurr AVR unit, Marsh:UV Disinfection Unit, carbon vents, distribution boxes, anti-flood kits, GRP kiosks, and turret guards.
3. Project Management Services: Comprehensive customer service including project management, BIM/CAD support, and design capability for bespoke tank solutions.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels7 records

Core offering

Marsh Industries Ltd manufactures and supplies off-mains wastewater treatment products in the UK, including packaged sewage treatment plants, septic tanks, pump stations, grease traps, oil separators, cesspools, and rainwater harvesting systems. Its Marsh Natural Solutions™ sub-brand delivers advanced nutrient removal systems (Nutra-Lite™ SBR, Phos-Lite™, Aqua-Puratine™, Marsh Gemini™) for phosphate and nitrate reduction at nutrient-neutral and environmentally sensitive sites. Products are sold across domestic, commercial/civils, agricultural, and leisure/holiday site sectors through a UK merchant network and direct sales.

Product overview

Marsh Industries Ltd is a UK manufacturer providing environmentally sensitive off-mains drainage products and solutions to domestic, commercial, agricultural, and leisure sectors. The product portfolio operates as a platform-plus-modules architecture built around sewage treatment plants and wastewater management. The core Ensign range (including Shallow Ensign variants and Ensign-EL) forms the primary sewage treatment platform, available in Standard and Ultra versions with capacities from 4 to 50+ population equivalent. The Marsh Natural Solutions™ sub-brand encompasses advanced nutrient removal products including Nutra-Lite™ SBR (Sequential Batch Reactor) for nitrate reduction, Phos-Lite™ for phosphate removal, Aqua-Puratine™ for combined nutrient neutral sites, and Marsh Gemini™ as an integrated combined system. Domestic solutions include the Uni:Gem★ septic conversion unit, pump chambers, SUMP2DRAIN and BASE2DRAIN pump stations, RainCell™ rainwater harvesting, and cesspools. Civils/Commercial offerings include Ultra:Polylok™, Marsh:Standard, and Portapura sewage treatment plants, plus ancillary products such as Whisspurr AVR units, Marsh:UV Disinfection, GRP kiosks, grease traps, oil separators, and stormwater attenuation systems. All products are supported by technical documentation including BIM/CAD libraries.

Differentiator

Problem solved

Functional benefit

Brands

• Marsh Natural Solutions™: Advanced sewage treatment, phosphate and nitrate removal solutions
• Nutra-Lite™
• Phos-Lite™
• Marsh Gemini™
• Aqua-Puratine™
• Ensign
• Uni:Gem★
• RainCell™
• Whisspurr AVR
• Marsh:UV Disinfection Unit

Products and services

• Ensign-EL Shallow Sewage Treatment Plant

Quantifiable outcome

• Ammonia reduction to 1 mg/l in final effluent
• +4 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Seven partnerships are on record, tiered minor.

• NBSminorStrategic or Co-development PartnerNBS Partner - Marsh Industries works with NBS, a platform providing building specification information and construction industry standards.
• British WaterminorStrategic or Co-development PartnerMarsh Industries is a member of British Water, the trade association for the water industry supply chain in the UK.
• Future Water AssociationminorStrategic or Co-development PartnerMarsh Industries is a member of the Future Water Association, supporting sustainable water management and innovation in the water sector.
• British Safety CouncilminorStrategic or Co-development PartnerMarsh Industries is a member of the British Safety Council, demonstrating commitment to health and safety standards.
• QMDminorStrategic or Co-development PartnerMarsh Industries holds QMD certification, indicating quality management standards compliance.
• Made in BritainminorStrategic or Co-development PartnerMarsh Industries is a member of the Made in Britain organisation, indicating British manufacturing origin of their products.
• GerflorminorGTM or Marketing PartnerGerflor CPD (Continuing Professional Development) partnership providing training resources for construction professionals.

Scale indicators3 records

Recent moves6 records

Direct peers

• Conder Environmental Solutions: UK manufacturer of precast concrete and GRP sewage treatment plants, septic tanks, pump stations and grease traps. Overlapping domestic and commercial STP/cesspool product range with Marsh’s Ensign and Standard product families.
• WPL (Water Processing Ltd): UK-based specialist manufacturer of packaged sewage treatment plants, including advanced biological and nutrient-removal units (e.g., DMS, Eco-Flo). Directly competes with Marsh’s Ensign and Nutra-Lite ranges across domestic, commercial and off-mains applications.
• Tricel: Manufacturer of packaged wastewater treatment plants (including the Tricel Novo and Vento ranges) and GRP tanks for off-mains sites across the UK and Ireland. Comparable to Marsh on packaged STPs and habitat-sensitive nutrient-removal targets.
• Clearwater Technology: UK provider of packaged sewage treatment plants, pump stations and stormwater management for domestic and commercial customers. Competes with Marsh in the same merchant-driven specification process.

Emerging players

• Premier Tech Water & Environment: Global manufacturer of decentralized wastewater treatment systems (Ecoflo, Ecofix) with active UK and European channel presence. Comparable on nutrient-removal technology and environmentally sensitive off-mains applications.
• Graf UK: European manufacturer of rainwater harvesting systems, soakaways and wastewater treatment tanks active in the UK. Adjacent category with overlapping specifier/merchant channel for off-mains sites.

Broad incumbents

• Kingspan Water & Energy (Klargester): Large group’s dedicated wastewater division (incorporating the heritage Klargester brand) selling packaged STPs, separators and stormwater systems through UK merchants. Broader portfolio and greater scale than Marsh, but overlapping product and channel proposition.

Regional players

• JFC Group (JFC Civils): Ireland-based manufacturer of GRP and plastic wastewater/septic products supplying UK and Irish merchants. Comparable product set and similar off-mains regulatory use cases, though primary geographic centre of gravity is Ireland.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/MarshIndustries
• Facebookfacebook.com/MarshIndustries
• LinkedInlinkedin.com/company/marsh-industries-ltd

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Marsh Industries Ltd