A storm drain is a network of underground pipes designed to control flooding by transporting stormwater from urban areas to a body of water. A storm drain may also be known as a curb, gutter, channel, ditch, pipe, or culvert. Facility storm drainage is therefore a network of pipes inside the envelope of a building which may include underground piping designed to control flooding by delivering stormwater from the roof to the network of pipes outside the building. Facility storm drainage is therefore restricted to that which is installed within the envelope of the structure to drain storm water from the roof of the structure.

A sump pump is an automatic water pump powered by an electric motor which removes drainage, excluding raw sewage, from a sump or low point. There are two basic kinds of sump pumps: pedestal and submersible. Either will work well with proper maintenance. Pedestal sump pumps are powered by an electric motor which sits on top of a pedestal. The pump itself sits down in the sump, but the motor sits on top, out of the pit. A pedestal pump motor is not designed to get wet. The pump is turned on and off by a ball float. One advantage of this type of pump is that the on/off switch is visible, so the action of the ball float can be easily seen.

This topic covers information related to roof drains that are installed during construction. Roof drains are installed on flat roof surfaces to provide a drainage location for ponding stormwater.