AS/NZS 3500.3 – My blog

January 14, 2025

Charged Downpipe Systems to Rainwater Tanks: Rules That Pass

Design rules for charged (wet) downpipe systems feeding rainwater tanks — head, pipework, overflow and maintenance details that pass certification.

Double-Storey Roof Drainage: Council Requirements & Mistakes

Common council requirements and design mistakes on double-storey roof drainage in NSW — upper-to-lower roof discharge, charged downpipes and overflow.

Roof Drainage Plans for Single-Storey Houses in NSW: CC & CDC

What NSW builders need in a roof drainage plan for CC or CDC approval on a single-storey home, including gutter and downpipe…

News & Insights

Charged Downpipe Systems to Rainwater Tanks: Rules That Pass

Double-Storey Roof Drainage: Council Requirements & Mistakes

Roof Drainage Plans for Single-Storey Houses in NSW: CC & CDC