Unlike their European and Japanese counterparts, they’ve never warmed to bidets and other paper-saving technologies. Also, most Americans probably don’t understand how toilets work. For example, they don’t know that the water coming out of this sink is as clean as the water from their kitchen faucet. So kudos to Caroma for pushing the envelope with this combination high-efficiency dual flush (1.28/.8 gallon) toilet and sink. The mechanics of the toilet are simple. As the toilet refills after flushing, fresh water first passes out of the sink faucet, before filling the tank. The unit is WaterSense labeled with a standard 12” rough-in.