M6 - Dual - Flush Toilet Sets

Implementing this symbol means the business/company has dual flushing systems installed throughout.

Currently, the four-star system is at the top for water-saving, where the full flush will use 6 liters and 3 liters of water with the half flush. Make sure that when replacing your existing system the complete arrangement is replaced and not only the flushing unit. In the new arrangement, the toilet bowl is designed with a restricted water trap at the bottom of the bowl so that 6 liters are enough to export all the necessary waste. By only replacing the cistern, the toilet suite will not perform correctly and water will be wasted by flushing several times in an effort to keep the bowl clean. This of course defeats the purpose of the replacement of the cistern only, wasting even more water than before. The use of composting toilets will save 100% of water and there are great systems on the market. Composting toilets do emit four times less amount of methane gas, compared to the wet system, which produces methane gas at the wastewater treatment plant where all the town’s wastewater is collected for purification. Refer to implementation M4.


Example: Four-star rated dual flush toilet set Compared with the old single flush system usually consuming 10-12 liters used with one single flush (4-time use per day per person) The example is made with one toilet set only and using the average between half and full flush water amount.
NoteTimes/Hours/Amount UsedDays Per Week UsedDays Used in One YearConsumption of ResourceTotal Use of ResourceCost of Resource Per UnitTotal Resource Cost in One YearEstimated Implementation CostEstimated Savings in Five YearsEstimate Pay Off Time
Without Implementation4 Flushes365 11 litres per flush16'060 l$ 2.35$ 37.75---
With Implementation4 Flushes365 4,5 liter per flush6'570 l$ 2.35$ 15.43-$