Kombiringen A6 lightweight manhole cover

Solution to replace heavy lid on concrete tanks, for example. Airtight lid with stainless steel locking dial. Suitable for cones and pipes with internal diameters 600 mm and 640 mm. Internal diameter of well onto which the lid is to be fitted must not be less than 595 mm. In the frame there are 4 pre-drilled holes dimension 11 mm that are used to secure the covering to the concrete well, c/c distance between the holes is 725 mm. Expender bolts may be used as the hole is not close to the edge of the concrete cone. Where there is a risk of splitting the cone, bolts and French bolts are to be used.