Taiwan's government classified the building as a national relic in 1993, several years after the pumping station inside had ceased operation. Much of the original equipment (see below) remains in place, although it's been repainted and polished up. The arc-shaped main building (see top left), which has small bronze domes at either end, was designed by Japanese architect Nomura Ichiro (野村一郎), the man also responsible for what is now National Taiwan Museum.
The station was planned by William K. Burton (1856-1899), an Edinburgh-born, Cambridge-educated engineer who worked for the Japanese colonial authorities. He risked disease and banditry in his effort to identify sources of clean water in the hills near Taipei. The dysentery and malaria he contracted in Taiwan also certainly shortened his life. Burton also planned another superb Japanese-era edifice which, unfortunately, is not open to the public: The Old Tainan Watercourse in Shanshang.
The museum is open 09.00-18.00 Tue-Sun. During the summer, opening hours are often extended. Admission, which is NTD80/60/40, also gains you access to a small network of trails and an open-air display of pipes and other water-distribution equipment. Of the latter, the most interesting is a heavy-duty pipe bucked by the September 21 Earthquake.
The museum can be reached by rapid-transit train. From Gongguan MRT Station on the Xindian Line, take exit 4, turn left at Siyuan Street and then walk a few minutes towards Tingzhou Street. Note these directions down before you set out as within the MRT station there's no English-language sign pointing the way.