Ben Buckler sewer vent, sewer vent in North Bondi, Sydney, Australia

The Ben Buckler sewer vent is a reinforced concrete shaft on a rusticated, splayed pedestal, rising from a fluted base to a rendered capital, with a cast iron cap on top. Its maximum internal diameter is 12 ft, narrowing to 7 ft 2 in at the top, and it stands 100 ft above ground. Steel compression bands, ladders and lightning conductors have been added over the years.

A brick vent shaft was built here in 1888 over the outfall sewer, measuring 3.7 by 1.5 metres and 16.92 metres high, but it soon cracked. Engineer-in-Chief John Smail designed its replacement, and the brick shaft was demolished in 1910 for the reinforced concrete stack that still stands, inscribed "Metropolitan Board of Water Supply and Sewerage erected 1910". Hydrogen sulphide corrosion led to repairs in 1938, 1948, 1956, 1963–65, 1977–78 and 2000–01.

The pedestal's southern face carries the inscription "Metropolitan Board of Water Supply and Sewerage erected 1910". Locals know the shaft as Ben Buckler, the name of the headland it stands on, and it appears as a landmark at the end of views along Curlewis Street and Old South Head Road. It now stands within Bondi Golf Course, ringed by a chain wire fence.

The shaft stands on Military Road in North Bondi, within Bondi Golf Course beside the escarpment, and is fenced off at its base. It is seen from the street and from New South Head Road at the corner of Penkevil Street; the interior is closed as it still vents the sewer.

The cast-iron cap on top is not original: the shaft lost its capital and has been fitted with steel compression bands, ladders and lightning conductors over decades of repairs. Inside, hydrogen sulphide gas from the sewer corroded the concrete so badly that in 1938 the inner lining was cut back 8.9 cm and replaced with clinker bricks.