AS NZS 4936:2002 pdf free.Air admittance valves (AAVs) for use in sanitary plumbing and drainage systems.
7.4 Airtightness
Air admittance valves shall withstand a positive internal pressure up to 10 000 Pa without leakage. When tested in accordance with Appendix C, the valves shall show no signs of leakage.
7.5 Endurance and temperature
Air admittance valves shall operate reliably throughout their service life. They shall be deemed to comply with this requirement if, when tested in accordance with Appendix D, valves pass the airtightness test of Appendix C after operating at the test temperatures over the given time periods.
7.6 Opening characteristic and flow
Air admittance valves shall have a measurable airflow when a constant pressure of
—150 ±10 Pa is applied to the inside of the valve. When tested in accordance with Appendix A, the valve shall have an airflow no less than the determined airflow capacity when a constant pressure of —250 ±10 Pa is applied to the inside of the valve.
7.7 Thermal cycling test for fixture traps
Products where the air admittance valve is integral with a fixture trap shall additionally comply with the thermal immersion cycling test of AS 2888.8 for 1 000 cycles at 20 +2,
—0°C and 60 +2,—0°C as the upper and lower test temperatures respectively. For this test the product shall be supported or suspended in such a manner that water drains from it between i mmersions.
8 INSTALLATION INSTRUCTIONS
Each valve shall be packaged with a complete set of installation instructions in accordance with Appendix E.
Valves shall be installed in accordance with AS/NZS 3500.2.2.
5 CLASSIFICATION
Air admittance valves complying with this Standard are suitable for location below the flood level of the appliance or fixture and suitable for operation in the temperature range 0°C to 60°C.
6 DESIGN
The connections of air admittance valves shall be dimensionally compatible with the product to which the connection is to be made, as specified in the relevant Standard for the product.
The air admittance valve shall be designed to be installed in accordance with the manufacturer’s instructions in respect to jointing methods, the orientation of the valve, minimum clearances from the pipe obvert and provision of access for inspection, maintenance, testing and replacement.
7 PERFORMANCE REQUIREMENTS
7.1 General
Air admittance valves shall be tested as supplied by the manufacturer, and installed in the manner recommended by the manufacturer. Where air admittance valves are supplied with one or more adaptors, the tests shall be repeated with each adaptor, to ascertain any effect that the adaptor may impose on the performance of the valve. The tests shall be carried out with the air admittance valve mounted within 50 of the vertical and fitted with any insulation, insect screen or other device normally supplied with the valve by the manufacturer of the air admittance valve.AS NZS 4936 pdf download.