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Marsh 3,800l Septic Tank

Marsh 3,800l Septic Tank

Regular price £1,050.00 GBP
Regular price £1,100.00 GBP Sale price £1,050.00 GBP
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Septic tank for basic treatment to off-mains wastewater

The Marsh Euro Septic tank offers significant technical improvements and cost-savings over current market options.

The range, available in capacities from 2800-4500 litres, is CE marked to comply with Construction Product Regulations and compliments the company’s existing range of horizontal septic tanks.

The Euro:Septic is tested and certified to EN12566-1 Annex B and benefits from an outstanding hydraulic efficiency of 99.63%. Horizontal septic tanks up to 20,000 litres are also tested and certified to EN12566-1.

Normally the simplest and most economical means of treating wastewater from small developments, a septic tank holds sewage and allows solids to settle into sludge at the bottom of the tank. Here it is naturally broken down by a process known as anaerobic digestion, which provides settlement and some biological treatment. The effluent is not fully treated and must receive additional treatment before discharge to the water environment – the most common method being to spread the effluent to land via an underground drainage field.

1 Inlet
2 Settlement chamber
3 Polylok filter
4 Outlet
5 Access cover


  • Tested to BSEN12566:1 and CE-marked to ensure compliance with latest environmental and Building Regulations requirements
  • Provides an outstanding 99.63% hydraulic efficiency
  • Unique Polylok filter improves effluent quality and prolongs drainage field life (Euro:Septic units only)
  • Traditional ‘onion-style’ tanks for standard installations
  • Low profile versions for high water table or hard rock site conditions
  • Heavy duty shell as standard to enable installation in all ground conditions
  • Integral lifting eyes for improved on-site handling
  • ‘Keying-in’ assists anchoring into granular or concrete surround
  • Pedestrian cover included as standard


Size Diameter
Inlet invert Inlet dia Outlet invert Outlet dia
2800L 1870 2780 1000 110 1040 110
3800L 2075 3000 1000 110 1040 110
4500L 2196 3100 1000 110 1040 110

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