The Brondell H2O+ Circle RO Water Filter's exclusive Smart Valve and unique circular reservoir design are the keys to its efficient design. This technology reduces wastewater to an average of approximately 2L for every litre of drinking water - up to over 10 times more efficient than many conventional RO systems. The Circle's refill rate is more than twice as fast as non-electric systems and equally as fast as those with electric pumps. It offers simplified installation and maintenance with features such as auto-flushing, twist and lock filter changes, and "quick-connect" connections. The Circle Reverse Osmosis System utilizes 4 separate water filters dramatically reducing industrial chemicals, heavy metals, pesticides, herbicides, total dissolved solids (TDS), volatile organic compounds (VOCs), microorganisms, bad tastes and odours. The Circle is the fastest, easiest, most elegant and efficient high quality reverses osmosis system available for a healthy home and family.