The B-pure Cartridge System provides you the flexibility of designing your own water system. The modular design allows you the ability to add additional holders when the need exists. If you need pure water of less quality than the NANOpure, E-pure, or EASYpure II can produce, the B-pure is the right system for you. Produces up to 4 liters per minute, depending upon feed water quality. Quarter-turn quick release canisters accept most Barnstead cartridges and filters. Allows for the addition of holders, as water needs change. Accepts Pura®-Lite purity indicator or digital purity meter. 1/2-size holders utilize smaller cartridges to conserve space. The Double Holder has a draw-off valve. Digital temperature compensated purity meter included. Can be ordered with Pura®-Lite "Go/No Go" resistivity indicator. The ½-Size Cartridge Holder produces up to 2 liters per minute of flow, depending upon feedwater quality. Accepts a variety of purification cartridges. Easily attaches to existing B-pure systems. Small size allows for flexibility in mounting location.