CORAL
6
Check soil natural permeability: 50 liters of water must be
able to soak away in not longer than 30/40 minutes.
Otherwise provide a pipe to allow rain water to ow either
into the sewage system or a sump well equipped with a
submersed pump.
Pic. 4
Pic. 5
IMPORTANT: once the housing has been positioned and installation completed, it is important for the top edge
to be level with the ground.
Piping Ø 5 cm
for passage
of electric wires
Concrete
cast
Cover with
about 30 cm
of concrete
Spirit level
12 cm
depth piping
centre
15 cm
loose pebble
drainage layer
Housing
170
330
400 mm
Ø 60
Ø 195
Soakaway pebbles
Possible
submersed
pump
ARRANGING THE HOUSING
fully retractable oil-hydraulic bollard
!
!
