The cap is made up of a cover equipped with a sealing gasket fixed to the casting by means of suitable anchorages which vary in length and size depending on the several applications. A special closing disc tightens the sealing gasket and the cap to the grouting. The disc allows to turn the cap into the most suitable position to allow all the air to come out of the vent tube.

“M” anchorages can be grouted in two ways whose procedures must be defined with the company before any activity on site is started.

The two grouting methods available are: * grouting with temporary or permanent cap * grouting with infilling.