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Clearwater Sigma Silage Storage Tank

Perfect for storing chemical toilet waste on your camping or caravan site


High Level Alarm

SKU: CWSSDS Categories: ,


These intelligently designed Shallow Dig Silage Storage Tanks have been devised to save you time and money during installation.  They are underground tanks which have been designed with a chemical liner to prevent the waste leaching through the main structure of the tank and causing premature tank failure and pollution. As well as being suitable for Silage these tanks can also be used for the storage of chemical toilet or dog waste.

These Clearwater tanks are completely sealed much like a cesspool tank but have a special lining to prevent corrosion – designed in accordance with BS6297 to ensure you meet all building regulations.

These tanks are available in the following sizes:







Includes a cover and frame. Single 0.5m neck with a pedestrian cover.

Key benefits:

  • Easy installation
  • Lockable cover
  • Perfect for installations where deep digs are not possible

These storage tanks are essentially holding tanks, they have no outlet and have to be emptied once full.

Optional Extra:

Add a High Level alarm with an audible and visual warning to alert you when the tank needs emptying

Offloading is the responsibility of the customer

Volume (litres) Diameter (mm) Length (mm) Invert (mm)
 2,800  1,225  3,020  500
 3,800  1,225  3,900  500
 4,800  1,425  3,775  500
 5,700  1,425  4,275  500
 7,150  1,920  3,230  500
 9,150  1,920  3,965  500

See also the technical diagram under the ‘Product Downloads’ tab

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