量水室古蹟廣場
Historical Water Metering Room Plaza

量水室原始興建年代與設計因檔案佚失無法得知，據調查量水室建築為日治時期大正2年（1913年）3月竣工，作為觀音山配水池出水計量之用。

民國82年由內政部將「唧筒室」列為3級古蹟，於民國91年2月臺北市政府再將「觀音山蓄水池」「量水室」「渾水抽水站」等建築體，連同唧筒室，擴大古蹟的指定範圍，臺灣第一個現代化的自來水設施，完成整體性的脈絡保存，並將這古蹟群正名為「水道水源地」。
Because loss and missing of files, there is no exact record indicating the initial building year of Metering Room, however, according to our investigation, it was completed in March, 1909, which was used to meter the water output of Guangyinshan Distribution Pond. It remained in service as late as 1977, after the completion of Gongguan Purification plant