The CP33 is an adjustable liquid chemical injector; it injects a precise amount of chemical over a specific period of time. The CP33 does not use electricity. It runs off of water flow and can work with system flows from as low as 12 gallons per minute to virtually unlimited water flow. The versatility of the CP33 is due to in part to its unique Injection Control Panel which provides a visual indicator of the injection volume allowing for dynamic adjustment to the injection volume. While the CP33 runs off of water flow it only uses a portion of the overall flow for power. This limits pressure loss within the water system and also allows the treatment of very large volumes of water. In fact the CP33 is exceptionally suited to injecting very small volumes of chemicals into large volumes of water!