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  • £2,245.00 ex. VAT
  • £2,694.00 inc. VAT
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Description

The Marsh Ensign 12 is an economical sewage treatment plant which complies with BS EN 12566-3. With a population equivalent of 12, this treatment plant is suitable for domestic use across 2 x 4-bedroom houses. In a workplace situation (without a canteen), this plant can accommodate up to 18 people. 

The Ensign is easy to install, reliable, and cost-effective for ongoing operation and maintenance.

The plant works initially by anaerobic digestion in the primary chamber, then aeration in the second chamber, where diffused air and mobile filter media ensure full treatment before the treated water flows to the final settlement chamber. The final effluent is then discharged to a drainage field or watercourse.

 

Benefits of the Ensign: 

  • The inlet and outlet have "Forsheda" seals, which provide flexibility in the inlet/outlet joint for easier connection
  • Option of internal or external air blower
  • PVC pressure pipe to diffuser
  • High-specification bio-media
  • 32mm Larger diameter sludge return
  • Stabilising feet for easier transportation and installation
  • Unique "keying in" lip helps anchor into concrete or granular backfill

Specification: 

Domestic Population* (PE): 12
Workplace Population - no canteen (PE): 18
Standard Invert (mm): 550
Standard Outlet Gravity (mm): 625
Standard Outlet Pumped (mm): 300
Length (mm): 2860
Width (mm): 1912
Height (mm): 2139
Weight in Kg (empty): 220
Pipe Work (mm): 110
Material: GRP
Lid Rating: Pedestrian
Air Blower Warranty (yrs): 2
Tank Warranty (yrs): 25
Testing Standard: BSEN 12566-3
CE Marked: Yes

* based upon up to 150 litres per head per day. All dimensions +/- 50mm due to manufacturing tolerances.

Discharge Quality:

Criteria National Minimum Standard  Marsh Ensign
BOD5 (mg/l) 20 11.5
SS (mg/l) 30 19.2
N-NH4 (mg/l) 20 8.4

 

Delivery:

FREE delivery of this product includes the whole of the UK Mainland and is subject to suitable access for a large goods vehicle. The customer is responsible for providing suitable mechanical offloading facilities (e.g. JCB excavator or loader) to offload this tank. If you need any assistance please contact us prior to purchase - please remember we are here to help! 

Sunday 7th June 2026
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