Roof rainwater drainage

The roof drain and piping layout is flexible
The system can be accompanied with multiple roof drains,with the quantity
being unlimited.
The reduction of the stand pipe quantity and reduction of the pipe diameter
would correspondingly reduce the quantity of the outdoor inspection shafts
and reduce the ground excavation.
As for the half pressure flow roof drain and half pressure flow heating
roof drain, there are such three kinds of outlet pipe diameters as of DN80,
DN100 and DN150. It is different from the traditional Type-87 Gravity Roof
Drain, which can not only be installed on the concrete roof, but also be
applicable for the steel-structured roof gutter. The improved pressure
plate and fastening bolt of the roof drain are both made of the stainless
steel materials. And there are such two kinds of short pipe materials as of
the stainless steel and HDPE.

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