Systems that utilize Pentair GRO membrane technology has a 1:1 waste water to filtered water ratio. WECO VGRO RO system is one such system. VGRO RO Systems - Reverse Osmosis Systems - Drinking Water Systems - Systems. You can convert your existing ro system to a high efficiency ro just by changing the membrane and the flow restrictor. read more
Detailed answer: The amount of water waste and clean water produced are intertwined. So before you can understand what is coming out of the system, you'll have to understand what is going into the system. read more