Not using the drinking water feature on RD106:
RD106 is a dual output system with one output for drinking water out of the faucet and the other output for aquarium water out of the DI filter. The tank is designed to hold the RO water after the fourth stage membrane. It is a 3.2 gallon tank, so whenever you are ready to dispense water from the unit, it will drain from the storage tank. If you do not wish to use the drinking water faucet or the storage tank anymore, simply remove the tank and inline carbon filter with tubing altogether. It does not affect the DI output section.