"The sump may be connected to
drain tile that drains the footings of the house, under the entire basement, or just the area where the sump is located. Many houses have
tiling installed only around a portion of the house. "
So, in some cases,
tiling means pipes made of tiles..?.
Humm, the footings on my foundation are
much deeper than the bottom of my sump holes..
Maybe that pipe is for floor drains in other parts of the basement.?.