Aquatic Life RO/DI 100GPD Deluxe Filter Four-stage RO/DI units remove harmful substances such as heavy metal ions and total dissolved solids from tap water The patented top-loading canister design makes it easy to check and replace cartridges Each unit includes non-marring feet for free-standing placement and a heavy-duty bracket for convenient wall mounting Accepts industry-standard size cartridges and membrane for easy servicing Includes tubing, faucet connection and starter set of cartridges and membrane to make initial use quick and easy