Marsh Sewage Treatment Plants

High-Performance Wastewater Treatment at a Competitive Price

The Marsh range is designed for homeowners, developers and installers who need a reliable, efficient and cost-effective sewage treatment solution without compromising on performance. It brings trusted Marsh engineering into a more budget-conscious package, making it ideal for today’s cost-sensitive projects.

Affordable Without Compromising on Quality

If you're looking for a system that balances price and performance, the ENCO range offers an economical alternative to higher-spec treatment plants while still delivering dependable, long-term operation and compliance.

Proven Treatment Performance

Independently tested and approved to BS EN 12566-3/A1:2009, all Marsh units consistently achieve treated effluent quality that meets or exceeds national consent requirements, giving you confidence in both compliance and environmental performance.

Flexible Options for Almost Any Site

With sizes ranging from 6 to 16 population equivalent (PE) and a wide selection of ancillary options, the ENCO range can be tailored to suit a wide variety of site conditions, planning requirements and budget constraints.

Easy Installation and Low Running Costs

Designed with installers and end users in mind, Marsh systems are known for:

• Straightforward installation
• Reliable, low-maintenance operation
• Cost-effective long-term running and servicing

This makes them a practical choice for both new builds and replacement systems.

Trusted Marsh Engineering

Building on the reputation of the Marsh® range, the ENCO system benefits from proven wastewater treatment design, backed by technical support from experienced local specialists. It’s a system you can depend on for consistent performance and peace of mind.

How It Works in Simple Terms

Wastewater first enters a primary settlement chamber, where solids begin to break down naturally. It then moves into an aeration chamber, where oxygen and beneficial bacteria work together to further treat the water. Finally, the clarified effluent is settled and safely discharged to a drainage field or watercourse.

This multi-stage process ensures effective, compliant treatment while keeping the system efficient and reliable.

A Practical Choice for Modern Projects

Marsh delivers a strong balance of affordability, performance and reliability—making it an ideal solution for developers, installers and homeowners who need dependable wastewater treatment on a realistic budget.