DuoSet dual flush toilet cistern

Caroma Industries Ltd

Powerhouse Museum

Powerhouse Museum
Sydney, Australia

Caroma's DuoSet toilet is a two button flush system allowing the user to select between a 9 litre and a 4.5 litre flush. The clear acrylic cistern is a specially made demonstration model to show the internal mechanism.

The Caroma dual flush toilet was developed in response to Australia's limited water resources. The introduction of the 9/4.5 litre flush system in 1980 reduced water use from an average 55 litres per person per day to 27 litres per person per day. As a result dual flush toilets were made mandatory around Australia in all new buildings. Caroma redesigned the cistern and pan in 1994 to produce an even smaller 6/3 litre product which reduced water use to 18 litres per person per day.


  • Title: DuoSet dual flush toilet cistern
  • Creator: Caroma Industries Ltd
  • Date Created: 1990
  • Location: Adelaide, South Australia, Australia
  • Physical Dimensions: 460 x 475 x 150 mm
  • Provenance: Gift of Caroma Industries Pty Ltd, 1992
  • See MAAS website: 92/282 DuoSet dual flush toilet cistern
  • Manufacturer: Caroma Industries Ltd

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