How Do You Filter Water With A Sand Filter?
Use a slow sand filter to treat raw water and make it drinkable. These filters are used mostly to treat surface water; no chemicals or electricity are required. Because the water flows through several layers of gravel and sand, water is filtered at a slow, constant rate. It is this simple design that allows slow sand filters to be used even in poor and isolated areas. Pierce the side of the clay pot, and insert a piece of flexible tubing 30 inches long into the side of the pot. The pipe needs to touch the bottom of the pot, and it also needs to be made water tight at its entrance into the pot. This acts as a pressure relief valve to ensure smooth operation of the filter. Place the clay pot in an elevated spot so that the filtered water can drain into a clean receptacle. Find and wash enough potato-sized stones to place in a single layer at the bottom of the clay pot; the gaps between these large stones will make it easy for water to flow through. Fill these gaps with a layer of smaller
