PP siphoned manhole covers are soil products that allow the best drainage of water and liquids from internal areas not subjected to excessive loads or strong exposure to atmospheric agents such as garages, cellars, underground rooms, bathrooms or showers. The items in this range are produced in various sizes with a non-slip raised surface; PP siphoned manhole covers are also available with an additional nozzle to adapt the drain. All PP siphon manhole covers are composed of two elements which together allow the siphoning effect: a body equipped with an inlet for drainage and a removable grid for effective inspection.