Marsh Ensign Sewage Treatment Plants

Proven, Reliable Wastewater Treatment for Homes and Projects

Marsh Ensign sewage treatment plants are trusted across the industry for delivering efficient, reliable and cost-effective wastewater treatment. Designed for homeowners, developers and installers, the range offers a dependable solution for projects where performance, compliance and long-term value all matter.

Simple, Low-Maintenance Design

The Ensign is built with simplicity in mind, featuring no internal moving parts. This makes installation straightforward, commissioning faster, and long-term maintenance and cleaning requirements minimal—helping to reduce hassle and ongoing costs.

Class-Leading Treatment Performance

Fully CE approved and tested to BS EN 12566-3/A1:2009, all Ensign units consistently deliver high-quality effluent that meets and exceeds national consent standards.

Independent test results show outstanding performance levels:

• BOD: 11.5 mg/l
• Suspended solids: 19.2 mg/l
• Ammonia: 8.4 mg/l

These results equate to approximately 97% pollutant removal, demonstrating reliable, high-efficiency treatment even under demanding conditions.

Flexible Options for Almost Any Site

With sizes ranging from 4 to 50 population equivalent (PE) and available in Ultra, Standard and Shallow variants, the Ensign range can be tailored to suit a wide variety of installation types, ground conditions and regulatory requirements. A broad selection of ancillaries also ensures flexibility for most site and budget needs.

Trusted by Installers and Homeowners

The Ensign range is widely recommended for its:

• Ease of installation
• Reliable long-term performance
• Cost-effective operation and servicing
• Strong technical support from local experts

It’s a proven solution that gives both installers and end users confidence from day one.

How It Works – Simple and Effective

Wastewater first enters a primary settlement chamber, where solids naturally break down. It then flows into an aeration chamber, where oxygen and beneficial bacteria work together to treat dissolved pollutants. Finally, the water moves to a final settlement chamber before being discharged safely via a Polylok filter to a drainage field or watercourse.

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

A Dependable Choice for Long-Term Peace of Mind

Marsh Ensign sewage treatment plants combine proven engineering, simple operation and outstanding performance—making them a reliable choice for anyone needing a robust wastewater solution that delivers lasting value.