said by Msradell: said by Raphion:
House is to the left, flow is going right. So the bell is on the upstream side of the tile.
Then you have a bigger problem because S__t doesn't flow uphill!
Must just be a trick of how you're seeing the picture, because it's definitely down-sloped. In the pic, it is running diagonally away from me, from the lower left, to the upper right. The high PVC you see is the washout, coming vertically to the surface.