Browse water purification systems that you can attach to a wall or bring in your vehicle for on site visits. Choose between the RO/DI Cart and Fill N' Go 50 Gallon System (RO/DI or delivery only). The RO/DI cart is a 3 stage purification system. It features a lightweight steel frame, designed to reduce wear and rust. It also has large wheels for easy transport. It is also includes 3/8" hose and TDS meter. The Fill N' Go is a premium delivery system. It allows easy and safe transport of pure water. There is also water fed accessories available.