Fig. 8: Under-the-sink RO filtration.
From: A critical review of point-of-use drinking water treatment in the United States
There is considerable flexibility in the number of stages depending on the needs of customers, which may contain up to seven stages including a sediment prefilter (SED), ion exchange (IEX), KDF or GAC media filters, activated carbon block (ACB) filters, RO membrane (ROM), remineralization media filters (ALK), UV sterilization (UVS) and/or postfiltration activated carbon (PAC) (reprinted with permission from181; Copyright© Express Water Inc., 2020).
