Plumbing and Drainage Guide 3rd edition (PDF)

This guide explains the general principles of the plumbing codes and standards for sanitary plumbing in New Zealand and Australia. Issues such as backflow prevention, protection from scalding and explosion by hot water installations and the use of air admittance valves are explained in clear and simple text. This edition was updated and released in April 2024 to reflect recent changes to AS/NZ3500 series and amendments to New Zealand Building Code clauses G12 and G13.