Level 2 · Plumbing revision
Rainwater Systems revision notes
Gutters and downpipes, sizing for rainfall and safe surface-water discharge.
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C&G Unit 208: Guttering, Downpipes & Surface Drainage
Rainwater (surface water) system components
The gutter, outlet, downpipe and drainage parts that collect roof water and take it safely away.
Rainwater system design: gutter types, falls, and bracket support spacing
Sizing gutters by roof area, setting falls, and bracket spacing intervals under BS EN 12056.
Rainwater Harvesting
Rainwater sizing principles: roof area and capacity
Effective area of a pitched roof (worked example)
A worked example of finding the effective plan area a pitched roof presents for rainwater run-off.
Rainwater design flow from roof area (worked example)
Combining rainfall intensity and effective roof area to get a design flow rate in litres per second.
C&G Unit 208: Rainwater Components & Materials
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