Roofing Rainwater Drainage and Collection System

Roofing rainwater drainage and collection system has dual function of rainwater drainage. Following the flow pattern in the roof rainwater drain line, the system includes three systems namely gravity flow, semi-pressure flow and siphon flow. Rainwater in gravity flow system is not fully filled; rainwater in semi-pressure flow system is demonstrated via mixture of air water in pipeline; rainwater in siphon flow system is fully-filled on way. Different system should apply professional roof drain.

During raindrop, roofing runoff rainwater is converged in the gutter that enters drain pipe through rainwater of various forms. By installing rainwater sundry sewage inception, part flow arrangement or split-flow devices in the rainwater vertical drainage pipe and blow-off pipe so that it discharges rainwater to rainwater pipe network at the outset of rainfall and when rainfall runoff rainfall reaches the pre-set data, spilt-flow device would automatically turn off the split-flow pipe and the system enters rainwater collection stage with rainwater collected entering water storage pond.