Rain Water Roof Pipe

Rain water that runs down a plumbing vent pipe at the roof goes into the house drain system at a point past the traps at the plumbing fixtures that keep sewer gas out of the home and heads harmlessly out to the sewer or septic tank.

Rain water roof pipe.

It is sometimes also referred to as a downspout drain spout roof drain pipe or leader. The roof drainage outlets and rainwater downpipes are calculated based on the design principles for gravity drainage systems established in ss525 2006 code of practice for drainage of roofs. As an example if the run of fall from a notional high point to a point of drainage is 20 meters then a minimal fall of 1 80 will see the roof level rise by 250mm. Counter flashing 28 metal.

The calculations below are meant for drainage from flat roofs where water are expected to spread over the entire flat roof during rain. On large roof areas having fewer outlets may cause a further design issue. Metal roof flashing metal roofing trim paintable roof flashing rain diverter roof flashing 20x20 aluminum extrusion 4 inch pipe. Water resistant 46 waterproof 51 flashing type.

Once the roof levels are designed and approved the selection of the rainwater outlets can be reviewed.