Filter Media

Filter Sand is primarily specified by effective size and a uniformity coefficient.  By definition, effective size is that opening (in mm) that will pass 10% of a representative sample of a filter material.  Uniformity coefficient is a ratio of the size opening (in mm) that will just pass 60% of a sample divided by the opening that will pass 10% of that sample.

Silica sand shall have a specific gravity of greater than 2.50 and an acid solubility of less than 5%. 

Silica shall be visibly free of clay, dust, micaceouos and organic matter.



Edgar Minerals Inc. is a NSF Standard 61 Certified facility, and manufactures filter sand meeting specifications in accordance with AWWA B-100.



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