Maintenance opening especially for drinking water supply, pressure-resistant up to 5 m water column.
Manhole, pressure-resistant up to 5 m water column, ready-to-install, round, made of stainless steel, with intermediate seal according to the area of application. Can be moulded over on both sides.
Blind cover as closure, with two handles for lifting, connected to the frame by screw connections.
Frame, designed as an F-piece with welded wall flange in the centre, prepared for setting in concrete. Transport lugs are attached to the frame.
Blind cover and frame welded under inert gas, pickled in an immersion bath and passivated.