draining tile
Webster's Dictionary (GCIDE)
Draintile \Drain"tile`\, n. A hollow tile used in making drains; -- called also draining tile. [1913 Webster]
Draining \Drain"ing\, vb. n. of Drain, v. t. (Agric.) The art of carrying off surplus water, as from land. [1913 Webster]
Draining tile. Same as Draintile. [1913 Webster]