This icon is depicting a manhole or sewer cover. The object is round in shape with two rows of vertical lines inscribed in the center as if to indicate this is an open grate.
This Sewer icon is made in flat color style
. This format was developed by Icons8 designer team and became immensely popular for use in web and mobile applications. Feel free to download this icon in PNG format for free, or unlock other formats for $5. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 6,000 icons, all in the same style and quality.