Water Supply Museum, Technical museum in Sfageion district, Thessaloniki, Greece

The Water Supply Museum occupies the Old Pump House and features two exhibition halls displaying large pumping machinery, electric motors, and power generators. The equipment on display powered the city's water distribution system for many decades.

The Old Pump House was built between 1890 and 1892 by a Belgian company as part of a modernization campaign that also brought railways and the gasworks to Thessaloniki. Its two steam-powered units pumped water from 1892 until 1929, when the equipment was replaced. The building later became the Water Supply Museum, which opened in February 2001.

The Old Pump House preserves the machinery that moved water from the catchment to the taps of Thessaloniki. In the former boiler room, a display explains how steam drove the pumps from 1892 to 1929, while the second hall holds MAN and Mirrlees diesel engines and BRUSH generators used until 1978.

The museum is located on Thessaloniki's western edge and welcomes visitors during weekdays. It receives many school groups, so visiting early in the day offers a quieter experience.

In the second hall stands a diesel engine with an open side panel that lets you peer inside at its working parts. This gives a hands-on view of how these machines actually functioned.