Major metro’s, most recently Kimberly, have launched a campaign advising residents to Drop-the-Block – this entails placing a brick in the toilet cistern, something that I remember our family doing back in the mid-1980’s in Kwazulu-Natal when we were suffering under those drought conditions. With people averaging 5 flushes per day and most households seeing 31% of their water consumption used in flushing, reducing the volume of water flushed into the sewer system is the ideal place to target to see immediate water saving.
While the brick does reduce the amount of water used per flush, it still flushes a fixed volume regardless of what is in the bowl. Since the mid-1980’s, there have been many flush mechanisms developed that allow the user to select all either a small flush or a large flush. These systems have been called Dual-flush mechanisms and are fitted in many bathrooms in South Africa.
The limitation of the dual-flush is that, once again, you are limited to choosing between two fixed-volume flushes. Water Rhapsody have developed a flush mechanism that allows the bathroom user to dictate exactly the least amount of water required to clean the bowl. This mechanism is called the Multi-flush and the name aptly describes its functionality.
Effectively you will depress the handle and hold it down to start the flush, and release when the bowl is clear – the flush mechanism will immediately stop when you release the handle. It often requires as little as 1-2 liters of water to clear the bowl, saving you 2 liters compared to the dual-flush, and a minimum of 7 liters if your cistern has a standard single-lush mechanism, per flush.