Tanks including tanks (structures) of metal, tanks (containers) of metal, water tanks of metal; slimline tanks of metal, under deck tanks of metal, bladder tanks of metal, underground tanks of metal; liquid storage tanks (structures) made of metal; liquid storage tanks (containers) made of metal; storage tanks of metal

Masonry tanks; slimline tanks, under deck tanks, bladder tanks, underground tanks, included in this class; non- metallic tanks (structures) including non-metallic water tanks (structures); settlement tanks, not of metal; storage tanks (structures), not of metal; storage tanks of masonry; tanks (structures), not of metal