"用瓦管排水的" can be translated as "drained using clay pipes" or "utilizing clay pipes for drainage".
Here are a few example sentences to illustrate its usage:
1、 The old town was drained using clay pipes, which added a unique historical charm to the area.
（这座老城用瓦管排水，为该地区增添了一种独特的历史韵味。）
2、 They are considering utilizing clay pipes for drainage in the new residential area.
（他们正在考虑在新住宅区使用瓦管进行排水。）