
- The frame must be installed on a flat, clean (free of dust and oil) and stable surface
- Always place the cover inside the frame (locked) before fastening it into the surrounding material
- The cover with frame needs to be surrounded by a strong stable material (concrete, asphalt, tiles…)
- If the cover and frame must be water- and gas tight (under pressure), the NBR rubber seal must be installed and the locks closed.
- If necessary, a thin layer of silicone can be applied to ensure the tightness of the cover and the frame. For complete sealing, the locks should be closed.
