Flowpath Engineering Portal
Watercare Water & Wastewater Demand Calculator — Auckland Code of Practice
Calculate water supply and wastewater design flows per Watercare Code of Practice for residential, commercial, industrial, education, and hospital developments in Auckland.
What this tool does
Watercare CoP-Compliant Design Flows
Reproduces Watercare Wastewater and Water Supply Codes of Practice (Tables 5.1.1-5.1.4 and 6.1.b/c/d) — calculates ADWF, Self-cleansing, PWWF, ADD, PDD, and PHD.
All Development Types
Residential (per dwelling/people), commercial offices, dry retail, wet retail, dry industrial (light/medium/high), education (schools, childcare, boarding, staff), hospitals, and light commercial area-rate.
Catchment Aggregation (A/B/C/D)
Combine existing upstream catchment, existing site (pre-development), and proposed development to derive the future catchment design flow as required by Watercare.
One-Click Pipe Capacity Check
Send the calculated PWWF straight into the Pipe Flow Calculator to confirm the downstream wastewater pipe has sufficient capacity.
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Open Watercare Water & Wastewater Demand CalculatorPart of the Flowpath Engineering suite of free civil engineering tools for New Zealand.