Based upon where you are from, different countries have different terms for "storm drain".

Based on where you are from, different countries have different terms for "storm drain".
Accordingly to Wikipedia, a storm drain is basically a tunnel that carry runoffs (rain) from urban areas. For a layman, it helps to think along the line of sewage system functions beneath our cities.
In the states, Jonite drainage grate is actually commonly known as "storm drain" or "storm sewer".
In the UK, this is typically referred to as "surface water drain" or "surface water sewer".
In Australia and New Zealand, it is also known as "stormwater drain".
And there it is, when you hear someone mentioning "storm drain", "storm sewer", "surface water drain","surface water sewer" and "stormwater drain", congratulations, you know they mean the same thing.
Functions of storm drain include draining excess water (rain or storm water) and ground water from pavement, streets and carparks into rivers and streams in order to avoid flooding.
Although storm drains accomplish a amazing job of draining excess water from the urban areas, the inlets are essentially openings where left uncovered could be a hazard to pedestrians. Left uncovered, rubbish will enter the storm drains and cause choking which might eventually end up with flooding.
In order to guarantee storm drains serve their purposes while minimizing the potential risks posed to pedestrians and to prevent choking of the drains, drain covers (gratings) are used to cover the inlets (openings) of the storm drains to achieve two purposes.
Over at Jonite, we concentrate on Jonite drain channel grate reinforced drain covers (gratings) which cover your storm drains while preserving the aesthetic components of the architecture around the drain covers.