017904-04 BioFicient 4-6 Installation Manual
11
(BY OTHERS)
6.
FURTHER BACKFILL STAGES
Continue to fill up tank with water and backfill evenly all-
round the tank, consolidating in 300mm layers.
DO NOT use vibrating pokers to consolidate concrete.
DO NOT discharge concrete directly on to the tank.
Ensure that the concrete is not too wet and that is tamped in
around the tank.
Continue until just below inlet / outlet pipework.
Remove covers and connect inlet and outlet pipework.
Continue to backfill.
7.
VENTING
Installer must ensure adequate venting is provided for treatment plant to work efficiently.
A vent connection is supplied in the tank neck and is clearly marked. This vent connection should only be
used to connect to venting pipework.
It is also important to seal off the air duct to the blower housing with expanding foam.
This prevents odour from reaching the blower housing and ensures blower is only drawing in clean air.
VENT PIPE & ABOVE GROUND STACK
(BY OTHERS)
BLOWER HOUSING
BLOWER AIR DUCT
(BY OTHERS)
CONCERTE PLINTH
(BY OTHERS)
OUTLET PIPEWORK
BIOZONE 1 & BIOZONE 2
AIR DIFFUSERS
900 mm
THIRD STAGE
INCOMING MAINS POWER
DUCT (BY OTHERS)
ACCESS COVER
INLET
PIPEWORK
