From a relatively small hatch to a complete door; everything can be installed in the Monostore system during the construction period without any consequences to the tightness or the stability of the construction.
In the past Monostore have even created an opening large enough to allow a bob-cat into the silo and larger openings are (after consultation with our design department) possible. This is the best example of the benefit of constructing a tank of in-situ concrete. Of course our hatches are of such a quality that tightness is guaranteed and liquids in the system cannot cause any defect to it as well. We test them frequently to ensure this.