Tricel Novo UK10, Technical Manual

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19
5.5.2 Installation – step by step guide
Steps
Installation required
Gravel Concrete
Installation
of the tank
base:
1
Remove any soft spots or large stones and boulders.
2
A 250mm layer of suitably compacted
gravel forms the base.
A
50mm layer of suitably compacted gravel,
covered with a 250mm layer of semi dry
concrete forms the base.

3
Ensure that base is level and at the correct height to accommodate the incoming pipe
work.
4
It is important to maintain a completely dry
excavation until the final pour of concrete
becomes set. It may be necessary to line the
excavation with a continuous layer of 1200-
gauge polythene to maintain the integrity of
the concrete.
Positioning
the tank
onto the
base:
5
Mechanically lift the plant carefully into
the centre of the hole and place on the
prepared base. Mechanically lift the plant carefully into the
centre of the hole before the concrete sets.
6
The plant must sit level on the base.
7
Connect and seal the pipe work to the tank.
Backfilling
around the
tank:
8
Ballast the plant by filling each chamber with clean water to a depth of 300mm and
recheck the pipe work levels.
9
Commence backfilling with gravel in
layers of 225mm evenly around the tank
ensuring that there are no voids until
gravel has reached 50mm over the
cylindrical body of the tank. Compact
each layer in succession. * Commence backfilling evenly around the
tank, ensuring that there are no voids until it
has reached the invert of the outlet pipe.
Continue backfilling with gravel, until it has
reached 50mm over the cylindrical body of
the tank. *
Note
* Continue filling the chambers with water while backfilling, ensure that the progressive water
level is no more than 300mm above the backfill level.
10
Mount and seal manhole risers (if used). Please refer to section 5.9 ‘Risers.’
11
Complete backfilling with topsoil up to the max ground level. Allow for subsequent
settlement of topsoil.

Important
A competent person should complete the plumbing to, and from, the plant in accordance with
national regulations and best practices.