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Nowadays, the manhole cover are only used for covering the hole, it is not only functionless but also tedious.
This new design has a multiple function which can be used to cover the hole, indicate the rainfall and drain away the water. Also, it’s delicate appearance can also beautify the street view.
There are three graduation,15mm 30mm and 40mm, on the surface of the rainhole cover, it can indicates the level of the rainfall. When the rainfall comes to 40 plus mm per hour, the holes in the middle of the cover can accelerate the rate of draining away the water.
New Taipei City, Taiwan