Ashfield Reservoir, Water reservoir in Holden Street, Ashbury, Australia

Ashfield Reservoir (Elevated) (WS 3) is a cylindrical riveted steel tank on a steel girder frame, resting on a concrete apron at Holden Street, Ashbury. A facade of concrete columns and arches wraps the stand as a decorative, non-structural feature. The rim walkway is carried on external brackets, and the tank holds 1,000,000 imperial gallons (4.5 ML) at a full service level of 260 feet (79.25 m).

The tank was built in 1912 as one of four similar structures commissioned by the Metropolitan Board of Water Supply and Sewerage during Sydney's industrial expansion. This series of reservoirs marked an important phase in modernizing the city's water infrastructure systems.

The reservoir reflects how Sydney organized its water supply in the early 1900s and shows the role such facilities played in serving a rapidly growing city. The structure and its setting document the importance of water infrastructure to people living in these areas at that time.

The reservoir stands at Holden Street in Ashbury, in Sydney's Inner West, not the south-west. The tank, its steel girder frame and the concrete columns and arches of its surround can be seen from the street; the walkway decking planks have been removed. The grounds also hold workshops, offices and two skid huts.

Two skid huts stand in the reservoir grounds, described in the heritage listing as a rare survival that shows former working conditions at the Metropolitan Board of Water Supply and Sewerage. The site also holds workshops, offices and access to the Pressure Tunnels.