NCC 2025 Volume Three B1D3 (cold water services, all classes) · AS/NZS 3500.1:2025 Section 3 and Appendices C and D
NCC 2025 Volume Three B1D3 requires a cold water service in any class of building to comply with AS/NZS 3500.1, and this calculator applies that Standard's sizing method and checks the 3 m/s and 50 kPa / 500 kPa limits that Performance Requirements B1P2 and B1P6 also set.