Fixed chemical injector F-M connecting is an efficient fixed chemical injector designed for high-pressure cleaners and widely used in cleaning, disinfection and other operations. The injector can effectively inhale detergents, chemical liquids or disinfectants, and mix them with high-pressure water flow to form a powerful cleaning liquid or disinfectant solution, significantly improving the cleaning effect or achieving precise disinfection. The injector is usually installed at the outlet end of the pump and connected to the equipment via an F-M connection. The injector has a built-in small-aperture nozzle, which, combined with the aperture difference of the chemical nozzle, produces a pressure difference, triggers the siphon effect, and then opens the one-way valve to automatically inhale detergent or other chemical liquids. After the liquid is fully mixed with the water flow, it is evenly sprayed out from the nozzle to achieve the ideal cleaning or disinfection effect. This design ensures the stability of the suction volume and is easier to use without manual adjustment.