Rain Water Roof Pipe

Description for besstem upvc rainwater fittings series domed roof outlet grating spigot end besstem upvc pipe fitting rainwater downpipe system bs en 12200 1 2000 besstem upvc pipe and fittings rainwater downpipes are generally manufactured from unplastized polyvinyl chloride pvc u.

Rain water roof pipe.

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. It is sometimes also referred to as a downspout drain spout roof drain pipe or leader. Inside diameter black new construction or reroof thermoplastic vent pipe roof flashing model pb 312 4bk 19 97.

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. 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. A rainwater downpipe is a pipe that is used to direct rainwater away from a building typically from roof guttering to a drainage system. 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.

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