BASE PREPARATION GUIDE

A proper preparation of the base pad for your tank will ensure that the installation process goes smoothly. Please follow the guide in this page to prepare your tank base.

Tank Model Reference Table

 
MODEL
TANK DIAMETER
MINIMUM PAD DIAMETER
MINIMUM PAD THICKNESS
m3 OF SAND/CRUSHER DUST
m3 OF BLUE METAL
MINIMUM WATER (LITRES)
CT6
3.92m
6.00m
 150mm
4.3m3
1.0m3
2,500
CT9
4.70m
6.70m
 150mm
5.3m3
1.0m3
4,000
CT12, HGT55
5.49m
7.50m
 150mm
6.7m3
1.0m3
5,500
CT15, HGT75
6.26m
8.30m
 150mm
8.2m3
1.2m3
7,000
CT20, HGT90
7.06m
9.10m
 150mm
9.8m3
1.2m3
9,000
CT25, HGT110
7.84m
9.90m
 150mm
11.6m3
1.2m3
11,000
CT30, HGT135
8.63m
10.70m
 150mm
13.5m3
1.2m3
13,500
CT35, HGT160
9.41m
11.50m
 150mm
15.6m3
1.6m3
16,000
CT41, HGT188
10.18m
12.20m
 150mm
17.6m3
1.8m3
18,500
CT48, HGT220
10.99m
13.00m
 150mm
20.0m3
2.0m3
21,500
CT54, HGT250
11.77m
13.80m
 150mm
22.4m3
2.0m3
24,500
CT60, HGT285
12.55m
14.60m
 150mm
25.2m3
2.0m3
28,000
CT70
13.31m
15.40m
 150mm
28.0m3
3.0m3
31,500
CT80
14.09m
16.10m
 150mm
30.6m3
3.0m3
35,500

1. Pad specifications

The preparation of the pad for your tank is the responsibility of the customer. Our preferred base material is fine crusher dust; however, if crusher dust is not available in your area, please insist on using screened sand from your local area
(please do not use recycled sand as it may contain contaminants). It must be free of sticks, stones, and clay lumps (6mm diameter or less). 

  • Level Pad (+/- 10mm)
  • Minimum thickness of pad is 150mm (or 250mm for RT310 and RT-365)
  • Minimum compaction of 120kPa
  • Dimensions are outlined on the table below
  • Ensure adequate compaction of the sub soil to avoid subsidence for deep pads
  • The customer is required to place an exclusion zone of minimum 20mm Blue Metal/Stone (no clay or concrete) around the base of the tank after installation to prevent erosion and deter rodents from digging around the base

IMPORTANT: If the site is cut and filled to form the base for the tank, ensure there is adequate compaction (minimum allowable bearing pressure of 120kPa) of the sub soil to avoid subsidence.

IMPORTANT: Adequate drainage must be installed to divert water run off away from the tank.

IMPORTANT: If site access or the pad quality is not adequate, it may be necessary to charge an hourly rate of $65.00 per person for our installation team to leave the tank and reschedule the installation (possibly weeks) until the problem is corrected.

2. Site access

  • Please ensure adequate access to the site for a small
    truck or 4WD and trailer, bearing in mind soil and
    weather conditions
  • Vehicle access is to be available within 10 metres of site
  • If unable to meet these requirements, please contact
    your Installer or Install Co-Ordinator to make alternative
    arrangements

3. On the day

Attendance:

  • Whilst not essential due to individual circumstances, we highly recommend meeting the installer on site prior to the install commencing. This will assist in confirming the exact location of all the components and other on-site considerations.

Water:

  • The customer is required to arrange supply of 10% of the full capacity of the tank in litres of water upon completion to stabilise the liner. This is a condition of the warranty and MUST be provided on the day of
    installation.
  • Note: Our Liners are suitable for the storage of water within a pH range of 3-9, and a water temperature of – 6ºc to + 40ºc.

Payment:

A tax invoice will be forwarded upon notification by the installer of Practical Completion.

For full information, please download the Base Preparation Guide Document.