Non-electric chemical injectors are designed as a two-part system. It comprises a water motor and chemical pump. The non-electric water motor functions on demand with water flow. A fixed diaphragm replaces a moving piston used by the driving mechanism of the water motor. It is inserted into the bottom of the water motor is a positive displacement chemical pump. The chemical pump draws directly from a stock solution container and injects into the water line. No chemicals enter the water motor.