Roof drain

The rainwater hopper located on roof rainwater into the gutter by rainwater pipes at the entrance. The rainwater hopper rectifier grid device, can rapidly eliminate roof rainwater, grid with rectification, to avoid the formation of large eddies, stable water level reduction aeration bucket, rapid elimination of roof rainwater and snow, and can effectively prevent more debris

The rainwater hopper is divided into 87 type, 79 type, 65 type, siphon type rainwater bucket, weir type rainwater bucket three categories. General use type 87 (type 79, type 65 Edition) and siphon rain water bucket. See "civil engineering design technical measures - water supply and drainage".