Agricultural water troughs and water fittings. Specification for water trough bodies, service boxes and water supply system|Stiffeners, Rim, Galvanizing, Impact testing, Stop valves, Solvent extraction methods, Agricultural equipment, Reinforced materials, Water valves, Marking, Glass fibres, Boxes, Feeding troughs, Cements, Thickness, Watertightness tests, Volume, Troughs, Steels, Tensile strength, Carbon black, Anti-siphonage systems, Ball cocks, Concretes, Livestock equipment, Depth, Elongation at fracture, Plastics, Polyethylene, Water, Pipes, Pipe fittings, Design