The Plumbing Code of Australia (PCA) is a technical code that outlines the requirements for the design, construction, installation, replacement, repair, alteration, and maintenance of plumbing and drainage systems in Australia . It is a crucial document that ensures all plumbing and drainage work in the country meets the minimum required standards.

Structure of the Plumbing Code of Australia

The PCA is divided into several sections, including:

• Section A: Governing requirements
• Section B: Water services
• Section C: Sanitary plumbing and drainage systems
• Section D: Excessive noise
• Section E: Facilities

Relationship with the National Construction Code

The PCA is now referenced as the National Construction Code Series, specifically as Volume Three — Plumbing Code of Australia . The National Construction Code (NCC) sets out the requirements for the design and construction of buildings in Australia, including plumbing and drainage work .

Availability and Compliance

The PCA is available online as a downloadable document . It is essential for all plumbing and drainage work in NSW to comply with the PCA . The PCA is also a deemed-to-satisfy requirement for stormwater drainage, as specified in AS/NZS 3500.3 Plumbing and drainage Part 3: Stormwater drainage.

Key Features of the Plumbing Code of Australia:

1. Performance-Based Approach: The PCA adopts a performance-based approach, allowing for flexibility in meeting the requirements. This means that while specific solutions are provided, alternative solutions can be used if they meet the performance requirements.

2. Volume Structure: The PCA is structured into different volumes within the NCC:
   - Volume Three: Specifically dedicated to plumbing and drainage systems.

3. Scope and Application: The PCA covers a wide range of systems, including water supply, sanitary plumbing and drainage, stormwater drainage, heating, ventilation, and air conditioning (HVAC) systems, and on-site wastewater management.

4. Referenced Standards: The PCA references various Australian Standards that provide detailed technical specifications and methods for compliance.

5. Sustainability and Efficiency: The code includes provisions for water efficiency and sustainability, encouraging the use of water-saving technologies and practices.

6. Health and Safety: Ensures that plumbing systems do not pose health risks to occupants or the public, addressing issues such as contamination, backflow prevention, and safe water temperatures.

7. Regulatory Framework: The PCA is enforced by state and territory plumbing regulators, who may have additional local requirements or amendments.

8. Updates and Amendments: The PCA is periodically updated to reflect new technologies, practices, and research findings. It is important for professionals to stay informed about the latest changes.