This drawing is the water supply and drainage design drawing of the underground garage. The design includes water supply, fire protection, civil air defense, and basement piping system. The underground garage is relatively large, and a "foam spray" combined system is built, which adopts the centralized single tank type and special foam pipe transportation. Drawings include: water supply and drainage design description, spray water supply system diagram, spray plan, fire hydrant water supply system diagram, water supply and drainage plan