Ensign 16PE Sewage Treatment Plant

The Marsh Ensign is widely regarded as one of the most efficient, reliable and economical sewage treatment plants on the market.

Size Guide 

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£4,204.32 inc VAT £3,503.60 exc VAT

SKU Ensign 16PE Category Tags ,


Ensign 16PE Sewage Treatment Plant

This Ensign 16PE Sewage Treatment Plant: Standard septic tank replacement is capable of treating household wastewater for up to 16 people. The Shallow Ensign:Standard sewage treatment plant is widely regarded as one of the most powerful, dependable, and cost-effective on the market.

The average height of a water treatment plant on the market is over 2.3 metres. Marsh Industries offers a shallow plant range ranging from 4-35PE that is just 1.6m wide, making installation not only feasible but much simpler and safer.
When hard rock site conditions necessitate deeper alternatives that require expensive and time-consuming excavation, shallow Ensign sewage treatment plants are often preferred.

Class-leading performance

All Ensign units are tested and accepted to BSEN12566-3/A1:2009 and provide care that is well within national consent criteria. With influent concentrations on tests higher than those selected by most competitor plants, published test results of 11.5:19.2:8.4mg/ltr (BOD: suspended solids: ammonia) effectively equate to 97 percent pollutant elimination.

Unrivalled choice

Almost all platform, approval, and budget criteria can be met with sizes ranging from 4 to 35 PE in Ultra and Standard versions of each, as well as a wide range of ancillaries. On request, risers to increase invert depth are available. On request, pumped outlets are also open.

Why choose the Marsh Shallow Ensign:Standard?

The Ensign range is recommended by end consumers, retailers, and installers alike due to its ease of installation, durability, and cost-effective operation and maintenance. Much of this is backed up by technical assistance from local contacts.

  • Inlet with ‘Forsheda seal’-Forsheda seal provides flexibility in the joint for easier installation. Optional risers to increase invert depth are available.
  • Primary settlement chamber
  • Aeration chamber
  • Advanced compressor with alarm (Ensign:Ultra units only)-Near silent compressor ensures minimal running, maintenance and servicing costs. Integral alarm detects low pressure in air line. (Regular Low-energy compressor on Ensign:Standard models).
  • Compressor housing – internal or external options available-The compressor can be housed internally or externally with no difference in cost. External recommended to increase compressor life, and supplied as standard on 4PE, shallow and pumped outlet versions.
  • RCD/Electrical connection (Ensign:Ultra units only)-The RCD box provides easier installation and provides a higher degree of safety. (Regular
    plug/socket connection on Ensign:Standard models).
  • PVC pressure pipe/diffuser(s)-Provides a protective conduit for the air diffuser line. Can be easily removed for maintenance and
  • Bio-media-High specification bio-media (310m3 per m2) and membrane diffusers ensure even circulation to eliminate ‘dead spots’. The bio-media is contained by a stainless steel securing mesh to ensure no migration during handling or potential flooding.
  • Stainless steel mesh (Ensign:Ultra units only)-Retains media in aeration chamber during transportation and handling, and in the event of flooding.
  • Final settlement chamber
  • 32mm sludge return-Larger diameter sludge return prevents the possibility of blockages and improves system circulation. Provides higher effluent quality whilst balancing flow over a 24 hour period or periods of intermittent use.
  • Unique Polylok tertiary filter (Ensign:Ultra units only)-The Polylok tertiary filter reduces suspended solids and BOD by a further 40% helping to extend drainage field life.
  • Outlet with ‘Forsheda seal’-Forsheda seal provides flexibility in the joint for easier installation. Optional pumped outlets are available.
  • Impermeable lid (Ensign:Ultra units only)-Heavy duty lid/frame improves strength and durability whilst blending into the surrounding
    environment. (Regular lid on Ensign:Standard models).
  • Integral lifting eyes-For safe and secure on-site handling.
  • Stabilising feet-Stabilising feet prevents the tank from rolling and allows safe and steady transportation and
  • Unique ‘keying-in’ lip-Assists anchoring into granular or concrete surrounds.

Size Guide

Additional information

Size Required

Gravity, Shallow, Ultra, Ultra Shallow


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