It is located in the Sfageion area near the city's western entry point.
This building was constructed between 1890 and 1892 by a Belgian company, as part of the campaign to modernize Thessaloniki, along with other construction projects like the railways and the gasworks, and later on the electricity company and the tram network.
The first one used to be the boiler room and had two steam-powered units which were used to pump water from 1892 until 1929.
In fact, one of the machines is open at the side so that visitors can see what happens inside it when it is working.
In the rest of the building there are displays of old components, measuring instruments for the water-supply network and tools used by repair teams.