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...
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