It's a icon of a fire hose wound up on a spool type item. The end of the hose has a pointed nozzle on it that hangs down on the left side of the spool.
This Fire Hose icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.