What are dual-drive basins and why are they important



Checking dual-action basins is the first thing you should do to start saving water

Always using the same amount of water in every flush is pure waste.

In times of rationing, due to the very low water level in the reservoirs that supply São Paulo, double-action basins should be standard for all houses and apartments, as savings can reach 50% in water consumption.

Dual-action basins, or dual flush basins, as they are also known, were developed to pour 3 or 6 liters into the toilet bowl, as needed. They can be installed both for wall outlets and for coupled boxes.


It all depends on which trigger button is chosen. The smaller button pours 3 liters of water, while the larger one pours 6 liters of water.

Valves without this feature spend, on average, 12 liters per flush in toilets with attached boxes and 10 liters in cases where there are valves on the walls.

The oldest basins, manufactured over 10 years ago, can use between 12 and 40 liters per cycle. Nonsense! Therefore, expert advice is to change the discharge to a dual-drive model.

Due to leaks and malfunctioning flushing, a condominium of buildings in Barra Funda, in São Paulo, reached consumption similar to 70 flushes per day in each apartment.

To solve the problem, the residents replaced 551 valves in the boxes attached to the 324 condominium apartments and leisure areas.

They managed to reduce the water bill from R$22,000 to R$7,000, according to the manager Sérgio Giamas, a savings of R$15,000 per month. If you consider that the annual savings, in this case, reach R$ 180,000, it is certainly an investment that pays off quickly.

How to install double actuation basins?

In the case of the Barra Funda condominium, a company was hired to exchange all the valves. However, manufacturers say that people who have basic DIY skills can make the switch with the help of instruction manuals.