Closets for use with chemicals. Specification for permanently installed closets|Performance testing, Quality, Chemical closets, Life (durability), Handles, Marking, Toilet seats, Strength of materials, Water-absorption tests, Design, Impact testing, Fixed, Stain tests, Mechanical testing, Dimensions, Water-resistance tests, Instructions for use, Efficiency, Sanitary appliances, Containers, Flushing cisterns, Chemical-resistance tests, Water absorption, Sewage, Test equipment, Loading, Performance