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Sewage Treatment Plants

Need assistance or advice with a product or lead time? Call our friendly Customer Services Team on 0117 244 4099 for expert help........don't forget we price match on most products!

Domestic & Commercial Sewage Treatment Plants 

A Sewage Treatment Plant is a great solution for treating sewage when your property is not connected to a mains sewer. They operate by removing contaminants from wastewater allowing the treated effluent to be discharged to a watercourse or drainage field.

Sewage Treatment Plants are typically put in place when you cannot install a septic tank within your premises. If you're unsure of which size plant you require, it depends on how many people will be using it. Our quality range of sewage treatment plants are available for 6 - 300 people.

Our range of sewage systems are produced by well trusted manufacturers including Klargester, Marsh Industries, Tricel and Harlequin.

Free delivery is available on certain sewage treatment plants - if you require any further help, please don't hesitate to get in touch.

BIOROCK BEASY-2000 Non Electric Sewage Treatment Plant 2PE

The BIOROCK BEASY 2000 is a below-ground non-electric sewage treatment plant. Being powerless, this makes it ideal for off-grid applications in remote..

£2,355.00 (ex. VAT) £2,826.00 (inc. VAT)

Marsh Portapura 2 PE Portable Above Ground Sewage Treatment Plant

Marsh Portapura 2 PE sewage treatment plants are designed for above or below-ground installation and are ideal for workshops, temporary accommodations..

£2,775.00 (ex. VAT) £3,330.00 (inc. VAT)

Marsh Portapura 3 PE Portable Above Ground Sewage Treatment Plant

Marsh Portapura 3 PE sewage treatment plants are designed for above or below-ground installation and are ideal for workshops, temporary accommodations..

£3,135.00 (ex. VAT) £3,762.00 (inc. VAT)

Marsh Ensign 4PE Sewage Treatment Plant

The Marsh Ensign 4 is an economical sewage treatment plant which complies with BS EN 12566-3. With a population equivalent of 4, this treatment plant ..

£1,775.00 (ex. VAT) £2,130.00 (inc. VAT)

Marsh Ensign Ultra 4PE Sewage Treatment Plant

The Marsh Ensign Ultra 4 is an upgrade on the Ensign Standard sewage treatment plant which also complies with BS EN 12566-3. With a population equival..

£2,345.00 (ex. VAT) £2,814.00 (inc. VAT)

WTE VORTEX 4 Person Sewage Treatment Plant

Manufactured by WTE the VORTEX sewage treatment plant is a premium version of WTE's low-cost QUANTUM sewage treatment plant. The VORTEX is an Advanced..

now £1,925.00 (ex. VAT) was £2,394.00 (inc. VAT) now £2,310.00 (inc. VAT)

GRAF One2Clean Sewage Treatment Plant 5PE

The GRAF One2Clean system is a single-chamber wastewater treatment system capable of offering up to 99% pollutant removal with SBR lifting technology...

£2,035.00 (ex. VAT) £2,442.00 (inc. VAT)

Marsh Portapura 5 PE Portable Above Ground Sewage Treatment Plant

Marsh Portapura 5 PE sewage treatment plants are designed for above or below-ground installation and are ideal for workshops, temporary accommodations..

£3,595.00 (ex. VAT) £4,314.00 (inc. VAT)

Tricel NOVOUK6GSR - 6 Person Economy Sewage Treatment Plant | 6PE

  The Tricel Novo 6GSR is an economy version of the Tricel Novo UK6 wastewater treatment plant.   This plant is only available with a gravit..

£1,790.00 (ex. VAT) £2,148.00 (inc. VAT)

WTE QUANTUM 6 Person Sewage Treatment Plant

Manufactured by WTE the QUANTUM sewage treatment plant is an economy version of WTE's best-selling VORTEX sewage treatment plant. The QUANTUM is an Ad..

£1,395.00 (ex. VAT) £1,674.00 (inc. VAT)

BIOROCK Monoblock-2 V3 Non Electric Sewage Treatment Plant 6PE

The BIOROCK Monoblock-2 is a below-ground non-electric sewage treatment plant. Being powerless, this makes it ideal for off-grid applications in remot..

£3,801.00 (ex. VAT) £4,561.20 (inc. VAT)

Clearwater BioAir CW2 - 6 Person Economy Sewage Treatment Plant | 6PE

The new Clearwater BioAir CW2 sewage treatment plant uses aerated technology to produce a high-level water quality discharge. This CW2 version is suit..

£1,916.00 (ex. VAT) £2,299.20 (inc. VAT)

Harlequin CAP6 - 6 Person Sewage Treatment Plant

The Harlequin CAP6 is a compact sewage treatment plant designed specifically for domestic installations for up to 6 inhabitants (4 bedrooms). It is a ..

£2,135.00 (ex. VAT) £2,562.00 (inc. VAT)

Hydroclear 6 Person GRP Sewage Treatment Plant HGRP6/EC

  Manufactured by Harlequin, this GRP version of the Hydroclear sewage treatment plant is a shallow dig option with an overall depth of 1640mm! ..

£2,695.00 (ex. VAT) £3,234.00 (inc. VAT)

Hydroclear 6 Person Sewage Treatment Plant HC6

The HydroClear, represents significant progress for the domestic wastewater industry. Contemporary design engineering and analysis software and sta..

£2,195.00 (ex. VAT) £2,634.00 (inc. VAT)

Klargester BioDisc BA - 6 Person Sewage Treatment Plant | 6PE

The Klargester Domestic BioDisc is a package sewage treatment plant designed for use in domestic dwellings, small offices and light industrial premise..

£4,541.00 (ex. VAT) £5,449.20 (inc. VAT)

Klargester BioTec+ 2 - 6 Person Sewage Treatment Plant | 6PE

The new Klargester BioTec+ 2, sewage treatment plant is suitable for properties up to and including 4 bedrooms. The BioTec+ uses proven aerated techno..

£2,415.00 (ex. VAT) £2,898.00 (inc. VAT)

Marsh Ensign 6PE Sewage Treatment Plant

The Marsh Ensign 6 is an economical sewage treatment plant which complies with BS EN 12566-3. With a population equivalent of 6, this treatment plant ..

£1,765.00 (ex. VAT) £2,118.00 (inc. VAT)

Marsh Ensign Ultra 6PE Sewage Treatment Plant

The Ultra Model of the Marsh Ensign 6PE Sewage Treatment Plant is an upgrade on the Ensign Standard sewage treatment plant which also complies with BS..

£2,485.00 (ex. VAT) £2,982.00 (inc. VAT)

Marsh Gemini 6PE Combined SBR and Phosphate Removal Plant

The Marsh Gemini is a combined sewage treatment system that has been designed to significantly reduce the number of nitrates and phosphates discharged..

£4,190.00 (ex. VAT) £5,028.00 (inc. VAT)

Marsh Nutra-Lite 6PE Sewage Treatment Plant

The Marsh Nutra-Lite range of sewage treatment plants has been designed to significantly reduce the number of nitrates discharged during wastewater tr..

£2,195.00 (ex. VAT) £2,634.00 (inc. VAT)

Marsh Shallow Ensign 6 Person Sewage Treatment Plant

The Marsh Shallow Ensign 6 is a shallow-dig sewage treatment plant that complies with BS EN 12566-3. It is ideal for excavating in hard rock or in dif..

£2,780.00 (ex. VAT) £3,336.00 (inc. VAT)

Marsh Ultra Polylok L 6 Person Sewage Treatment Plant

The Marsh Ultra Polylok L6 (UPL) is a domestic sewage treatment plant which complies with BS EN 12566-3. With a population equivalent of 6, this sewag..

£2,295.00 (ex. VAT) £2,754.00 (inc. VAT)

Tricel NOVOUK6 - 6 Person Sewage Treatment Plant | 6PE

  Tricel Novo wastewater treatment plants are reliable, easy to install and simple to maintain for all wastewater requirements. The Tricel N..

£2,065.00 (ex. VAT) £2,478.00 (inc. VAT)

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Sewage Treatment Plant Helpful Guides 

We've compiled a list of helpful blogs that should hopefully answer any questions or purchasing queries that you may have:

FAQ's

Sewage treatment plants work by eliminating contaminants from wastewater & household sewage by circulating air within the unit to prompt bacterial growth, which breaks down the sewage. These systems make for cleaner and more environmentally friendly effluent.

Step by step process:

  • Sewage travels into the first chamber of the plant where oils/greases float and solids settle.
  • Liquids move into a second chamber where air is pumped in, growing bacteria that break down contaminants.
  • Liquids then move into a final settlement tank where solids sink before discharge.

In order to comply with regulations, UK sewage treatment plants must be EN 12566-3 2005 certified. Installations should always be carried out by a qualified professional, and local guidelines should be checked for planning permission requirements.

Sewage treatment plants offer several benefits:

  • Long lifespan: 40–50 years.
  • Low running costs: Minimal electricity, annual maintenance.
  • Environmentally friendly: Safe effluent discharge into fields or watercourses (subject to local guidelines).

Regulations require treatment plants to be at least 7 metres away from building foundations and over 10 metres away from a watercourse.

Maintenance includes:

  • Testing influent and effluent quality
  • Monitoring chemical levels
  • Regular equipment/pipeline inspections
  • Proactive cleaning/lubrication
  • Annual “de-sludge” (more frequent for cheaper tanks)

Yes. It’s recommended every 6 months to prevent sludge build-up, odours, and reduced efficiency.

Before installation you may need:

  • Planning permission
  • Building regulations approval

Sewage treatment plants generally have two chambers:

  • Chamber 1: Separates liquids; solids sink.
  • Chamber 2: Motor circulates air to break down sewage. Clean effluent is then discharged.

The typical lifespan is 40–50 years for the plant itself, with equipment lasting 15–20 years.

Tuesday 9th June 2026
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