Kessel Aqualift S Basic Instructions De Pose Et D'utilisation page 24

4.6 Fitting the cover plate
Place the seal in the chamber correctly positioned an
grease it.
Put on the cover plate.
Tighten 3 screws, place anti-corrosion protection on
screw heads.
4.7 Leak test
Ensure that the system is de-energised, clean and free of building debris.
Feed clear water into the system tank until it reaches the top edge of the system tank (not the extension section).
Check whether there is any moisture escaping at the inlets, conduit pipe and ventilation pipe, if applicable.
Pump the water out.
If there is any moisture escaping, rectify the cause of this.
Ensure that no moisture can escape.
4.8 Backfill the excavation pit
Fill the excavation pit with suitable filling material
(crushed stone ballast with size 0/16 grain, 50 cm all
round), whilst compacting the filling material properly (e.g.
with a vibrating plate) to Dpr ≥ 95% every 30 cm.
For proper fastening, surround the base section with lean
concrete (see lean concrete wedge(1) in the figure).
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