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.