Aquatic Life RO/DI 100GPD Power Filter Built-in computer manages automatic backflushing of membrane to prolong its useful life Digital display alerts when unit has filled a container and valve has shut-off 100 PSI pump boosts incoming water pressure against the membrane for more efficient water production and less waste Four-stage RO/DI units remove harmful substances such as heavy metal ions and total dissolved solids from tap water Includes tubing, faucet connection and starter set of cartridges and membrane to make initial use quick and easy