4.1. Flush systems for WCs All Roca’s bathroom collections come equipped with dual-flush systems that allow for a reduction in the amount of water leaving the cistern. By using only the water you need, you can ensure great water saving every day. There are three types of dual-flush systems: Technology: Dual-flush system. 6/3 litre dual-flush A system that comes as standard in the cisterns of Action: Reduction in water used for flushing. most of our bathroom collections. Reaction: Water saving. 4.5/3 litre dual-flush 018 A reduced flush system that comes as standard in the cisterns of some of our bathroom collections. These can be adjusted to flush at 6/3 litres if there are any concerns about dry drains. 4/2 litre dual-flush Our lowest flush system that comes as standard in the cistern of CleanRim The Gap. How it works By pressing the (small) circular button, you flush with only 3 or 2 litres* of water from the cistern. By pressing both buttons, you flush with either 4, 4.5 or 6 litres* of water from the cistern. * Depending upon the dual-flush system installed in the cistern. All of our WCs are registered on the Water Efficient Product Labelling Scheme, meaning they have been independently verified as being water efficient. 6/3 l itre dual-flush system 4.5/3 l itre dual-flush system 4/2 l itre dual-flush system