Filter Gravel

• Full range of sizes that meet AWWA B100 and NSF 61 standards
• Clean, natural, rounded gravel (not crushed)
• High specific gravity for hardness and chemical resistance
• Packaged for convenient installation
• QC program ensures sampling, testing and verification
• Product delivered on-site and on-time
• Clean, washed 3/8 pea gravel and 3/4 septic now available (call with the volumes of material you need)

How to Purchase
For large and medium size gravels please please provide us with the top and bottom sizes in inch or mm (e.g., 1/2 x 1/4 or 6-12 mm). For finer gravels please provide us with the top and bottom ASTM E11 sieve openings or the mm openings ( 6×14 or 1.40-3.35mm).

Other Properties

Specific gravity (ASTM C128): >2.50
Acid Solubility (AWWA B100): < 5%
Hardness (Mohs Scale): 6-8
Sphericity and Roundness (API RP56): 0.6
Sodium Soundness (ASTM C88): <15%
Test for Clay (ASTM C40 or C117): plate 1 and 2
Unit Weight and Voids (ASTM C29): 100 lb/cu ft
Chemical Analysis: SiO2: 98-99; Al2O3: 0.03-0.3, Fe2O3: 0.03-0.3, Na2O, K2O, TiO2, MnO2, MgO: to 0.05.