Pumpwerk Breitensee, building in Vienna, Austria

The Pumpwerk Breitensee is a former water pumping station at Hütteldorfer Straße 142 in Penzing, Vienna. The complex was built in visible brickwork and comprises a machine house, boiler house, valve house, weigh house, cooling tower, coal depot and a two-storey staff dwelling. The dwelling has pilaster strips and an inscription "Stadt Wien MDCCCXCVI" on the attic.

The station was built in 1896 and served as the first of its kind in Vienna's water network, pumping water from higher sources into the city. After more than a century of operation, it was decommissioned in the early 2000s when a new reservoir called Steinhof came online.

The site is still used by MA 31 – Wiener Wasserwerke as a service building, and the former staff residence carries the inscription "Stadt Wien MDCCCXCVI" on its attic. The complex was built in exposed brick by the Union-Baugesellschaft, with machinery from the Prague firm Märky, Bromovsky & Schulz, which also supplied the iron roof structure.

The complex stands at Hütteldorfer Straße 142 in Penzing, on the site bounded by the 1904 Vega-Payer-Weyprecht-Kaserne to the east and the former Zeiss works of 1916 to the north. The buildings are still used as offices by MA 31 – Wiener Wasserwerke, so visits are limited to the exterior. Look for the attic inscription "Stadt Wien MDCCCXCVI" on the two-storey former staff residence.

During World War I, the station was briefly used to dry potatoes, and a small railway line was built to bring supplies directly to the complex. This unusual conversion shows how infrastructure was quickly adapted to meet wartime needs.