Marsh Horizontal Septic Tank 2800-12000 L

from £1,040.25

The Marsh Horizontal Shallow Septic Tank is designed for sites with challenging ground conditions. Its shallow design makes it a practical option where there is hard rock or a high water table, as it requires less excavation.

Available in capacities from 2,800 L to 20,000 L. For larger capacities, please contact our office for pricing.

Key Features

  • 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

  • CE Accredited, providing an impressive hydraulic efficiency of 99.63%. Tested and approved by PIA GmbH, Aachen, Germany

  • Pedestrian cover and frame included as standard

Operating Principle

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.

Size:

The Marsh Horizontal Shallow Septic Tank is designed for sites with challenging ground conditions. Its shallow design makes it a practical option where there is hard rock or a high water table, as it requires less excavation.

Available in capacities from 2,800 L to 20,000 L. For larger capacities, please contact our office for pricing.

Key Features

  • 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

  • CE Accredited, providing an impressive hydraulic efficiency of 99.63%. Tested and approved by PIA GmbH, Aachen, Germany

  • Pedestrian cover and frame included as standard

Operating Principle

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.


Product Specifications

Size: 2800L

Length (+/-50mm): 3000

Width (+/-50mm0: 1250

Height (+/-50mm): 1750

Inlet invert (mm): 500

Inlet dia (mm): 110

Outlet invert (mm): 800

Outlet dia (mm): 110

Download Specification

Size: 3800L

Length (+/-50mm): 4000

Width (+/-50mm0: 1250

Height (+/-50mm): 1750

Inlet invert (mm): 500

Inlet dia (mm): 110

Outlet invert (mm): 800

Outlet dia (mm): 110

Download Specification

Size: 4500L

Length (+/-50mm): 2650

Width (+/-50mm0: 1600

Height (+/-50mm): 2100

Inlet invert (mm): 500

Inlet dia (mm): 110

Outlet invert (mm): 800

Outlet dia (mm): 110

Download Specification

Size: 6000L

Length (+/-50mm): 2950

Width (+/-50mm0: 1900

Height (+/-50mm): 2400

Inlet invert (mm): 500

Inlet dia (mm): 110

Outlet invert (mm): 800

Outlet dia (mm): 160

Download Specification

Size: 8000L

Length (+/-50mm): 3640

Width (+/-50mm0: 1900

Height (+/-50mm): 2400

Inlet invert (mm): 500

Inlet dia (mm): 160

Outlet invert (mm): 800

Outlet dia (mm): 160

Download Specification

Size: 10,000L

Length (+/-50mm): 4200

Width (+/-50mm0: 1900

Height (+/-50mm): 2400

Inlet invert (mm): 500

Inlet dia (mm): 160

Outlet invert (mm): 800

Outlet dia (mm): 160

Download Specification

Size: 12,000L

Length (+/-50mm): 5200

Width (+/-50mm0: 1900

Height (+/-50mm): 2400

Inlet invert (mm): 500

Inlet dia (mm): 160

Outlet invert (mm): 800

Outlet dia (mm): 160

Download Specification


Certificate
Is your septic tank 2020 compliant?

Delivery & Returns

  • Free delivery for England, Wales, and most of mainland Scotland. Additional charges may apply for the Scottish Highlands, Scottish Islands, Northern Ireland, Isle of Man, Channel Islands, or other remote locations, confirmed before order confirmation or dispatch.

  • Most orders are fulfilled within 10 working days from payment. Larger or specialist items may take longer — please contact us if your order is time-critical.

  • Offloading is the customer’s responsibility. Suitable equipment should be available to safely remove goods from the delivery vehicle.

  • For full delivery details, see our Delivery Policy.

  • Returns & Refunds: Standard items can be returned within 14 days of receipt, subject to our Returns & Refunds Policy. Many products are bespoke or custom-made (modified dimensions, fittings, pumps, colours, etc.) and cannot be returned unless faulty.