Standard Products for Filtration Sand (for rapid)

Effective Size	0.35 mm	0.5 mm	0.6 mm	1.0 mm	Dimension Specification（JWWA A 103-1:2006-2）
					0.45～0.70 mm
Uniformity Coefficient	≦1.5 _or ≦1.4				≦1.7
Maximum Size	≦2.0 mm			≦2.8 mm	≦2.0 mm
Minimum Size	≧0.3 mm				≧0.3 mm
Appearance	Clean & Granular				−

We can also manufacture products with specified effective size and uniformity coefficients upon request.
Please be aware that effective size include tolerance values.

Standard Products for Filtration Sand (for slow)

Effective Size	0.30～0.45 mm	Dimension Specification（JWWA A 103-1:2006-2）
		0.30～0.45 mm
Uniformity Coefficient	≤ 2.0	≤ 2.0
Maximum Size	≤ 2.0 mm	≤ 2.0 mm
Minimum Size	≥ 0.18 mm	≥ 0.18 mm
Appearance	Clean & granular	−

We can also manufacture products with specified effective size and uniformity coefficients upon request.
Please be aware that effective size include tolerance values.

Quality Specifications for Filtration Sand (for rapid and slow)

	Quality Specifications (Physical Properties) (JWWA A 103-1:2006-2)
Density	2.57～2.67 g/cm3
Wash-up Turbidity	≤ 30 NTU
Loss on Ignition	≤ 1.3%
Abrasion Rate	≤ 3.0%
Hydrochloric Acid Solubility	≤ 3.5%

15 L PE bag, 600 L flexible container bag
*Pallet loading available upon request.

When placing your order, please specify the [Effective Size] _and [Uniformity Coefficient].

For the first time in Japan, Tohkemy products have received quality certification for all filter media (filter sand, anthracite, manganese sand, filter gravel) specified in theJWWA Standard “JWWA A103:2006-2” for water supply filter media.

●The quality of filter media is specified in the Ministry of Health and Welfare Ordinance and the Japan Water Works Association(JWWA) Standards.
●Previously, we have had business entities visit our factory
for inspections to verify quality. However, given the current labor shortages and the COVID-19 pandemic, we recommend JWWA-certified products that you can use with confidence without needing to verify them yourself.
●If your pipes and fittings are certified, make sure your filtration media—the heart of water purification—is certified too!