Sump: carbon steel construction. Bent with a fibre system and equipped with structural reinforces. Weldings with electronic control of the edges and of the gaseous mixture to assure perfect waterproofing. Layout, tolerances, rims, chamfers, nominal weight and finishing grade according UNI parameters.

Grid: Hot-galvanized carbon steel grid with heavy load resistant handles, put on the “L” welded profile perimetre and ( for some models) central reinforced omega.

Safety labeling: Safety labeling for accident and pollution prevention in compliance with current, EC and national regulations

Warranty: Registration and trial testing by hydraulic test at full load for 48 following hours at atmospheric pressure at room temperature.