Below is a video of the water treatment system in operation. Photos showing the construction of the model at various stages appear below the video.
Bottom of filter unit.
Filter unit stand.
PVC drainage ring.
Filter unit drainage system.
Gravel added as support layer.
Cloth sheet added between gravel and sand.
Filter sand.
Unassembled carbon filter.
Assembled carbon filter.
System plumbing.
Filter unit.
TDS tank and power system.
UV sterilization system.
Carbon filter and exit valve.
Completed water treatment system.