New requirement for junctions in drains
On 26 September 2023, the 2021 edition of the AS/NZS 3500 series was adopted through changes to the Plumbing Regulations 2018, as part of the deemed-to-satisfy requirements for compliance with the Plumbing Code of Australia (PCA).
The most significant change for below ground drains is where a 100mm junction connects a 100mm branch pipe to another 100mm pipe, the entry level of the branch pipe must be elevated at an incline of not less than 15 degrees above the horizontal. This requirement applies to drains in all classes of buildings.
For a detailed understanding of this and all other amendments, please refer to AS/NZS 3500.2:2021 and Volume 3 of the National Construction Code (NCC).
For further information and advice please do not hesitate to contact the Plumbing Technical Advice line on 1300 815 127 or by email.