North Sydney Sewer Vent

North Sydney Sewer Vent is a brick ventilation stack built as part of the original sewerage system to let air flow through underground pipes. The structure tapers narrower toward the top and is reinforced with visible steel hoops that hold it together.

This vent stack was built between 1891 and 1898 as part of the original sewerage system for North Sydney. It survived many decades until damage occurred during expressway construction in the 1960s, after which steel reinforcement was added.

This stack represents a piece of working infrastructure that residents have walked past for over a century without thinking much about it. Today it stands as a quiet reminder of the engineering that quietly served the city's growth.

The stack sits on a street in North Sydney and can be easily reached on foot in the area. It is best viewed from the street as it continues to serve its original function as part of the sewerage system.

At the base sits an iron inspection hatch marked with a plaque from 1899 by the Metropolitan Board of Water Supply and Sewerage. This small detail reveals the careful craftsmanship put into what was once routine city infrastructure.

Location: New South Wales

GPS coordinates: -33.82990,151.21300

Latest update: December 14, 2025 13:03