Sigma Septic Tank


The advanced design of the Sigma Shallow Dig delivers a robust, impact resistant and durable tank.
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Product Details

Key Benefits
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  • Fully compliant, tested and approved to EN12566 Part 1 
  • CE marked to comply with Construction Products Regulations July 2013
  • Robust and simple to install for reduced on-site installation time
  • Reduced excavation costs, saving you money 
  • Less soil disposal and less backfill material - kinder to the environment
  • Made from GRP - strong and durable for ultimate reliability 
  • Light, watertight and chemically resistant
  • Robust, weather proof for guaranteed durability, giving you value for money.
  • Product Code

    Capacity (Ltrs)

    No of People (150 Ltrs/head/day)

    Diameter (mm)

    Length (mm)

    Standard Invert Height (mm)

    STH028

    2800

    5

    1225

    2955

    500

    STH038

    3800

    12

    1225

    3895

    500

    STH057

    5700

    24

    1425

    4275

    500

    STH071

    7150

    34

    1920

    3225

    500

    STH091

    9150

    47

    1920

    3960

    500

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