The stainless steel adjustable chemical syringe is a key accessory widely used in high-pressure cleaners. With this syringe, detergents, chemical liquids or disinfectants can be effectively mixed with the high-pressure water flow to form a mixture that enhances the cleaning or disinfection effect. The syringe is usually installed at the outlet end of the pump and is equipped with a small-aperture nozzle inside. When a chemical nozzle with a larger aperture is connected, the difference in aperture between the two will cause a pressure difference, resulting in a siphon effect, opening the one-way valve of the syringe, sucking in detergent or other chemical liquids, and evenly mixing them into the high-pressure water flow. The sprayed mixture can be used for cleaning, decontamination or disinfection. The suction volume of this chemical syringe can be adjusted as needed, and the amount of liquid sucked in can be accurately controlled by rotating the adjustment knob to meet the needs of different users. The syringe body is made of stainless steel, which has extremely strong corrosion resistance and can be used for a long time in strong acid and strong salt solution environments.