This week we had ours installed and connected. The photo below shows the concrete tank going in.
With the risers installed so tank can be accessed at ground level.
Inside the tank.
Starting to install the weeping tiles. (I didn't take photos for several hours and missed the rest of the tiles going in. In the photos below you can see one row. The finished system had 10 rows.)
Installing the pipe that connects the tank to the weeping tiles.
The four posts mark the corners of the tile bed.
Tank connected to house drain from basement.
Backfilled and roughly graded.
A separate drain was also installed to collect any water that collects at the foundation and drains it (far) away from the house.