To face the growing increase in the theft of sanitation caps in cast iron and following several requests from entities that are reinstalling new devices with some frequency, ALTO has developed a manhole cover in composite material. This material, nonmetallic, has no commercial value for the receptors, thus reducing its thefts.

         These covers, class D400 of norm NP EN 124: 1995, were tested by an official entity that showed its strength and so are approved for installation on the public way.