Specifications
| Media type | Graded high-silica filter sand (washed, kiln-dried, screened) |
|---|---|
| Target contaminants | Suspended solids, sediment, turbidity |
| Color | Light tan to reddish brown |
| Mesh size | 18x35 |
| Effective size | 0.45-0.55 mm |
| Uniformity coefficient | 1.6 or less |
| Specific gravity | 2.65-2.75 |
| Bulk density | 100 lbs/cu. ft. |
| Service flow rate | Municipal 1.5-2 | Industrial 3 | Domestic 5 gpm/ft² |
| Backwash rate | 15-20 gpm/ft² |
| Backwash bed expansion | 20% of bed depth |
| Bed depth | 18-30 in |
| Freeboard | 20% of bed depth (min.) |
| Standard | Meets AWWA B100-96 |
Used alone for straightforward sediment removal or as the intermediate layer in a multi-media bed — anthracite on top, filter sand in the middle, garnet at the bottom — to combine high solids loading with fine polishing. Its spherical, uniform grain gives consistent flow and predictable backwash.
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