Drainage plan showing fixtures and fittings, hot water system(s), upper floor sanitary fittings with isometric layout showing wastes, pipes, falls, drainage layout with inspectionA Building Consent Authority (BCA) undertakes inspections while the building is being built to ensure compliance with the Building Consent. A BCA decides what inspections need to be carried based on an evaluation of the plans, specifications and other information. bends and junctions for both stormwater and sewage, other drainage on site, ventilation of sanitary rooms, calculations for sizing of downpipes
A plumbing and drainage layout (schematic) is required for all two-storey (or more) building applications. It should identify fixtures, waste and vent pipe sizes, fixings, materials, and the standard used (e.g. NZ/AS 3500).