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Graf Carat Cesspool

An underground cesspool suitable for buildings with intermittent use such as garden rooms.  Available in four sizes.

Graf 400mm Extension Piece

  • Graf-extension-riser

High Level Alarm (Overflow Guard)

  • Overflow Guard 351017

SKU: G50104-11 Categories: ,


These cesspools, also known as cesspits, are suitable for smaller applications. They are installed easily using a gravel backfill which means much easier and cheaper installation costs. 

GRAF Carat RS tanks are made out of 100% post consumer plastic waste. 

These tanks are available in the following sizes:





Larger sizes available on request – contact us.

Key benefits:

  • The tank has a ribbed base and is extremely stable
  • Can be installed easily using a gravel backfill which means much easier and cheaper installation costs
  • Low weight: can also be installed in difficult local conditions without a crane
  • Low maintenance: maintenance or cleaning work can be performed through the shafts
  • Tanks can be used as rainwater harvesting systems after thorough cleaning

This kit price includes as standard:

  • An injection moulded plastic Carat tank
  • A mini tank dome
  • A mini telescopic dome shaft suitable for pedestrian loading*

*Optional variation:  vehicle loading up to 3.5t, maxi tank dome, composite plastic telescopic lid


10 years warranty

Options available:

Heavy Duty cover – vehicle loading up to 3.5t with a maxi tank dome, composite plastic telescopic lid

Neck Extension – working height 305mm (total height 400mm)

High Level Alarm (Overflow Guard) – battery operated alarm with an audible and visual warning to alert you when the tank needs emptying

Please note: these tanks do not meet regulation for use on a permanent residence as they are too small. The minimum capacity required for any domestic household is 18,000l.

Emptying of a cesspool must be carried out by a licenced waste extraction contractor.

Offloading is the responsibility of the customer

Volume (litres) Length (mm) Width (mm) Height total (mm) Weight (kg)
Standard Cover 2,700 2,080 1,565 1,830-2,030 129
Heavy Duty Cover 2,700 2,080 1,565 2,150-2,450 175
Standard Cover 3,750 2,280 1,755 2,020-2,220 159
Heavy Duty Cover 3,750 2,280 1,755 2,340-2,640 205
Standard Cover 4,800 2,280 1,985 2,250-2,450 194
Heavy Duty Cover 4,800 2,280 1,985 2,570-2,870 240
Standard Cover 6,500 2,390 2,190 2,530-2,730 229
Heavy Duty Cover 6,500 2,390 2,190 2,850-3,150 275