Fig. 69.—Floor Tile.
Fig. 70.—“Mansfield” Floor Tile.
Whatever method of sub-drainage may be adopted, it is advisable to continue the tiles, or channels, right through to the effluent channel or chamber in straight lines, so that the effluent may have a clear way throughout its course under the filter, until it reaches the open effluent channel or pipe.
Fig. 71.