Uni Sewage Systems
Installation Guide
Uni:Domestic Sewage Plants
Trojan:4 Sewage Treatment Plant
Uni:SAF 6-50PE
Uni:SAF 25-150PE
Uni:GEM Retrofit Domestic
Uni:GEM Industrial & Commercial
Rainwater Harvesting
Pump Chambers - Uni Holland
Antiflood Valves
Cabinets & Control Panels
Compressors and Diffusers
Welcome to Marsh Industries


Marsh Industries was established to supply a new range of superior quality, next generation products into the environmental sector, with a responsive approach to customer service at realistic prices.

Marsh operate in three key sectors
  • Sewage Treatment Plants
  • Septic Tank Upgrades
  • Water Recycling Systems

Latest News


Well Water
In the UK the roof area and guttering system on the average four bedroom house captures over 98m³ of rainwater, it is then not normally harvested by the homeowner and goes direct to drainage more

The Uni:6-50PE plants are designed for above ground installation and provide sewage treatment more
The Uni:GEM Industrial & Commercial Plants are designed to provide primary and final settlement treatment more
The UniGem is a secondary treatment system which has a unique retrofit design more

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Etruria House, Brightwell Walk, Irthlingborough, Northamptonshire, NN9 5PJ