Section 918 of the International Plumbing Code describes the legal use of Air Admittance Valves as a means of venting a sanitary system.
918.3.2 states the following:
Stack-type air admittance valves shall be prohibited from serving as the vent terminal for vent
stacks or stack vents that serve drainage stacks having more than six branch intervals.
918.4 goes on to say:
Individual and branch-type air admittance valves shall be located not less than 4 inches (102 mm)
above the horizontal branch drain or fixture drain being vented. Stack-type air admittance valves shall
be located not less than 6 inches (152 mm) above the flood level rim of the highest fixture being
vented. The air admittance valve shall be located within the maximum developed length permitted for
the vent. The air admittance valve shall be installed not less than 6 inches (152 mm) above insulation
materials.
The way these sections are worded is confusing. Any advice? @Herin Reynold @simon
Air Admittance Valves (AAVs) can be used in high-rise buildings, but their application depends on local building codes and the specific plumbing design. AAVs are great for managing air pressure in drainage systems and can reduce the need for extensive venting pipes, making them a cost-effective solution in certain scenarios. However, in high-rise structures, the complexity of the drainage system and the need for reliability often require careful evaluation by engineers. For more interesting reads and entertainment, explore apnetv.com.au, your destination for Indian dramas, movies, and shows.