The three stage Value Series Reverse Osmosis units include the most important components of reverse osmosis systems, and are priced for the most value-conscious consumer. The RO units come assembled, and include: white housings, 5 micron poly sediment filter; 5 micron, 6,000 gallon carbon block; rust-proof bracket, and a Filmtec RO membrane. A housing wrench and drain saddle are also included.