A guide to constructing a pad for your water tank
The base of a gmTANKS water tank is manufactured using Bluescope double sided AQUAPLATE® Steel and is designed to sit directly on a relevant pad without the need for a stand.
Slimline and SquareLine Tanks
gmTANKS recommends the use of a concrete pad 100mm thick for a slimline tank. The concrete should be in the 25MPa range as commonly used for driveways and footpaths and should contain F62 reinforcing mesh. We do not recommend sloping the pad for drainage. Pad size should exceed both the tank length and width by 100mm
Round Tanks under 2M (2,000mm) Diameter
For round tanks under 2,000mm diameter we recommend either a concrete pad of 25mPa concrete or a 100mm thick pad of compacted crusher dust (fine gravel with max 5mm particle size) topped with pavers. Gravel and pavers should be contained by a permanent border (formwork) to prevent the pad being washed away from under the tank. Pad diameter should exceed the tank diameter by 200mm.
Round Tanks over 2M (2,000mm) Diameter
For round tanks over 2,000mm diameter a concrete pad or a paver base is still suitable, however due to the large surface area of the tank base it is also suitable to construct a 100mm thick pad of compacted crusher dust (fine gravel with max 5mm particle size). The crusher dust should be contained by a permanent border (formwork) to prevent the pad being washed away from under the tank. Pad diameter should exceed the tank diameter by 200mm.
All manufacturing warranties will be void in the event of damage caused by substandard base construction. Your local council should be contacted prior to installation for any applicable regulations.
Connection of your tank to mains water appliances (typically a toilet or a washing machine) must be completed by a licensed plumber and be fitted with a backflow prevention device.