below the oil-water separator.

The drain valve is generally located below the oil-water separator, and there is a screw-like structure at the end of the deposition cup, so that water and impurities can be discharged by twisting the screw.

the oil-water separator is a device, which can be divided into catering oil-water separator and industrial oil-water separator. The catering oil-water separator is used to treat sewage in the catering industry. Because of the requirements of environmental protection, the sewage discharged to the ship machinery in rivers, lakes and seas must be treated, and an industrial oil-water separator is needed.