Including a 20” prefiltration made of (sediment 5μm, Carbon GAC and Carbon block), 2 x 600 GPD membrane with 2 X Diaphragm pumps and auto flushing with reverse osmosis water ( 2 small pressure tanks included).Inlet and drain connectors. In this case faucet and tank are not included because depending on the installation it is better to use a bigger or smaller pressure tank as well as faucet model.