AQUA Flo High-Efficiency Reverse Osmosis (H.E.R.O.) system

The system also flushes the membrane with pure RO water every time the tank is full to ensure that high TDS water never creeps through the membrane during low pressure times.
After this flush, the controller de-pressurizes the membrane so that only pure, high quality RO water is produced when the system restarts. This process allows the H.E.R.O to provide up to 99% Total Dissolved Solids (TDS) rejection.
Comparable systems typically waste 4-12 gallons for every gallon of RO water produced.