The drain system is shown here. The filter fabric is laid in a U shape with the perforated drain pipe in the middle. The fabric prevents the fines to clog the pipe. Small rocks fill be empty space to provide good drainage
The drain system is shown here. The filter fabric is laid in a U shape with the perforated drain pipe in the middle. The fabric prevents the fines to clog the pipe. Small rocks fill be empty space to provide good drainage