There is no substitute for correct site
preparation. Correct site preparation is
essential to ensure a long and
trouble-free life for your water tank.
It is essential to have your water tank
on a
FLAT LEVEL COMPACTED BASE. The
base of your water tank must be fully
supported at all times.
CONCRETE
SLAB
Concrete Slab must be at least 25mpa and
100mm (4”) thick with F62 mesh halfway
through the mix. It should be screeded
flat and level with no high or low
spots. The finished surface should have
a trowelled finish.
CRUSHER
DUST
Crusher dust bases must be 300mm (12”)
wider than diameter of the water tank
and prepared as follows:
- Remove at least 100mm (4”) of
natural earth, ensuring the base is
flat and level.
- Refill with at least 75mm (3”)
of crusher dust thoroughly mixed
with dry cement powder (for a 4m
(13’) base we suggest 2-3 bags of
cement powder).
- Once spread, thoroughly compact
the crusher dust with suitable
compacting equipment, not by any
other means.
- Thoroughly screed the surface
and ensure the finished surface is
perfectly FLAT AND LEVEL and free of
stones, tree roots, etc. Do not
water to set the cement powder,
natural moisture will do this when
your tank is in position.
Note: Sand is not acceptable.
MOLASSES
TANKS
Molasses tanks must have a concrete slab
or suitably constructed tank stand with
flat level deck to be considered for
warranty.
INSPECT
THE BASE REGULARLY checking for,
and rectifying, any undermining by water
run-off or animals borrowing such as
toads, mice etc.
NATIONAL
POLY INDUSTRIES accepts no
responsibility for negligence or
otherwise, for loss or damage to poly
water tanks installed by the customer
notwithstanding that the customer has
relied upon and followed the
recommendations contained herein. These
recommendations are a guide only and we
do not warrant that the recommendations
are accurate or suitable for use by any
particular customer or for any
particular poly tank sold.
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