AS/NZS 1546.3 provides: 1. a set of performance statements which define the requirements of an aerated wastewater treatment system. 2. a basis against which an aerated wastewater treatment system may be assessed; manufacturers of aerated wastewater treatment systems with basic specifications that will enable the testing agency to check that a product conforms to the Standard. 3. purchasers of an aerated wastewater treatment system with confidence that the system will perform as checked by a testing agency. 3. and sets out performance requirements, design requirements, means of compliance, installation requirements, requirements for operation and maintenance and specifications for testing aerated wastewater treatments systems and associated fittings.