QUADRO

Waste water clarifying installations, installations for treating waste water, rainwater, atmospheric water, namely, settling pipes, settling tanks, settling pits; water filters for household and industrial purposes

Building materials, not of metal, namely, gutter pipes, drainpipes, water conduits, grilles not being for ventilation and heating purposes, shafts, manhole covers; Flushing and inspection shafts, not of metal, being integral parts of trenching drainage installations