CSI uses venturi technology in order to inject chemicals into the irrigation line.  Venturis offer several advantages over traditional piston or diaphragm pumps, such as smooth flow, simple adjustment, and more.  A complete list can be found here.

CSI injectors are ideal for most fertigation or chemigation jobs.  They can be fitted with 15, 60, 160, or 400 gph injectors, and have a number of useful options and accessories.

Electric motors are most commonly used to power the pump, but gasoline or diesel engines can be used where electricity isn't readily available.  If a hydraulic pump exists on site, that can be used to drive a hydraulic motor instead.

CSI injectors are built on compact steel frames.  Accessories, like wheels, hose kits, or automated controls (such as in the model on the left), can also be mounted on the frame for a complete injection system.