Choose the half flush when it is enough
Why this can help
The smaller option on a working dual-flush cistern uses less water when it clears the toilet effectively. Water-saving guidance recommends choosing the flush suited to the use.
One possible next step
Identify the two controls on your existing cistern and use the smaller option when appropriate.
What changes the outcome
Check the actual volumes and maintain hygiene. Repeated flushing can erase the saving. Do not add the same volume reduction to a separate low-flow-toilet estimate.
Your illustrative scenario
Over one year · with the assumptions below
You
1,095 litres of water used less
You + 10 friends
12,045 litres of water used less
1,000 participants
1,095,000 litres of water used less
Each participant repeats your scenario. This is hypothetical participation, not measured collective savings.
Your inputs
- Water per effective flush, including repeats Before
- 6 L
- Water per effective flush, including repeats After
- 3 L
- Comparable occasions per year
- 365
Calculation of the difference: (6 − 3) × 365 = 1,095 litres of water used
Calculation boundaries
Only fresh water used for the same service is counted. Include rinsing and repeated attempts. Heating, water treatment and carbon emissions are outside this account. Check the actual volumes and maintain hygiene. Repeated flushing can erase the saving. Do not add the same volume reduction to a separate low-flow-toilet estimate.
The initial values are editable arithmetic examples, not measurements or typical savings from the cited studies. Replace them with comparable readings for your situation. The sources support the mechanism and its conditions; they do not predict these numbers.
Sources and calculation references
- Sydney Water — Water saving tipsSydney Water
Read the method: universalizable.com/en/method/ · One sheet · print double-sided, long-edge binding