About this asset

This New Zealand Building Code G13 Foul Water compliance document provides the regulatory framework for plumbing and sanitation systems. This official compliance document outlines the Acceptable Solutions and Verification Methods required for meeting Clause G13 of the New Zealand Building Code. It specifically addresses the design, installation, and performance criteria for foul water drainage systems. The document includes technical specifications, diagrams, and calculation methodologies essential for ensuring sanitary plumbing systems function correctly and safely. As a second edition resource, it details the necessary pipe sizing, gradient requirements, and venting standards to prevent the accumulation of foul air and ensure effective waste discharge within both residential and commercial building projects.

The download is a 2.6 MB file containing .PDF files.

Professionals should utilise this PDF as a primary reference during the schematic and detailed design phases of a project. It serves as a verification tool to ensure that plumbing layouts comply with national health and safety standards. Architects and engineers can cross-reference their drainage schematics against the provided tables and diagrams to confirm compliance before submission for building consent. The document is best used in conjunction with local hydraulic design software to validate system performance and adherence to mandatory site-specific sanitation requirements.

This document is indispensable for architects, hydraulic engineers, and building certifiers working on projects across New Zealand. It is essential during the planning and construction stages of residential, commercial, and industrial developments where foul water management is critical. Professionals frequently search for this standard when designing complex drainage networks, selecting compliant pipe materials, or preparing documentation for council inspections. It integrates directly into the technical library of any practice focused on high-quality, code-compliant infrastructure and sustainable sanitation solutions for diverse building types.