Thanks guys for your help. Yeah, I should have been more specific.
The development is residential about 200 houses (6 units per acre) in a middle income area.
The reticulation would be for internal potable uses only. External and firefighting is provided via a separate non-potable supply...
I want to size a drinking water plant for a small community of 200 homes and an estimated 600 people.
Can someone please tell me what rules of thumb are used to relate peak design flows to the average daily flow for a network of this size?