Sand filter for swimming pools dwg
The oldest and most popular filtration method is sand. sand filters use a special filter sand, typically 0.45 to 0.55 mm (also known as #20 silica sand for pools), because it has sharp edges that serve to separate particles, allowing filtration to occur. sand filters are the most economical of the three types of filters, but they only filter particles up to 20 to 40 microns in size. sand filter operation requires some knowledge, but it is still one of the easiest ways to keep your pool clean. contains 3d model of filter.
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