Support Gravel Media

Support Gravel Media

Support gravel, the lower strata of a filter bed, acts to support the filter medium. The maximum efficiency, the support gravel must possess the necessary attributes of hardness and be rounded or non-angular. Correct gradation and sizing must be calculated to properly support the filter media.

The chemical content is less than 0.0001% of the following: arsenic, cadmium, chlomium, cyanide, copper, nickel, lead, zinc and mercury.
AWWA Standard B100-01 and NSF Standard 61 approved.

Chemical Breakdown

  • Acid Solubility: 1.7%
  • Porosity: 38.35
  • Loss on ignition: 0.69%
  • 24-hour absorption: 0.48%

Physical Characteristics

  • Color: multi-color
  • Bulk Density: 100 lbs./cu. ft.
  • Specific Gravity: 2.65+
  • Mesh Size: 2.5 in. x 3 mm
  • Hardness: 7.0 (Mohs scale)
Product Size 2½ x 1½ 1½ x 3/4 3/4 x 1/2 5/8 x 3/8 ½ x ¼ 3/8 x 3/16 1/4 x 1/8 3/16 x 3/32 1/8 x 1/16
US MESH INCH                  
2 1/2" 2.500 98                
2.0" 2.000 65                
1 1/2" 1.500 6 98              
1.0" 1.000 1 44              
7/8" 0.875   24              
3/4" 0.750   5 97            
5/8" 0.625   1 51 98          
1/2" 0.500     4 66 98        
3/8" 0.375     1 4 68 98      
1/4" 0.25       1 6 18      
4 0.19         1 4 67 99  
5 0.16             35 90  
6 0.13             8 64 98
1/8" 0.13             6 18 96
7 0.11             2 10 75
8 0.09               6 48
10 0.08               2 18
12 0.07                 3
14 0.06                 1


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