|
SAND FILTER FOR IMPROVING WATER
The water from many rivers and lakes is polluted. A modern purification system or a deep well supplies the best, clean, safe drinking water. However, families without safe
drinking water must build their own system to improve the quality of the water they drink. The illustrated sand filter has limited capabilities but can improve the water quality. Once again the low cost
cement storage tank that is described in Bulletin 4 can be used as the tank for the sand filter.
|