BS 1438:1971 Specification for media for biological percolating filters
Publication Year
1971
Document Status
Withdrawn
Abstract
Single-sized materials, 63mm to 14mm, including coke, clinker, gravel, crushed stone, slag for treatment of water, sewage, trade effluents. Durability; sizes; descriptions of shape, nature of surface and group classification; flakiness, cleanness, sampling and testing; supplier's certificate; independent tests. Notes on use appended.
Document History
Superseded by BS 1438:2004.
ISBN
058006784X
Publisher Information
British Standards Institution
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