Standard
Specification for Vitrified Clay Filter Blocks Clay blocks, Drains, Filters, Filter drainage, Media, Media supports, Support, Trickling filters, Underdrains, Clay blocks, Clay materials/applications-specifications, Clay pipe/piping systems-specifications, Clay products (general)-specifications, Clay products (structural)-tile (specifications), Compression testing, Construction materials, Filter drainage, Filters/filter procedures, Industrial waste treatment-specifications, Loadbearing masonry units-specifications, Masonry units-specifications, Media supports, Trickling filters, Underdrain systems, Vitrified clay, Wastewater testing/treatment-specifications