When you invest in a product to do an important job, you want to know your investment is a good one. However, buying a rainwater tank can be hard given the wide range of types, water tank designs, and brands on in the Australian market.
We’d like to make your task easier. If you have any questions or would like a free quote, please give us a call to chat to one of our friendly advisors, or use the form above.
The Clark Tanks Difference
- Your tank will be made from food-grade polyethylene for safe and fresh-tasting water
- You’ll receive a tank with a ribbed-profile for added strength (and they look much better than smooth profiles too!)
- You’ll have a tank that is constructed in one piece (no lid for the roof) – no mosquitos, algae or vermin will get in this way!
- Thicker walls at the base and no side seams prevents warping and keeps your tank’s structural integrity intact.
- You’ll be able to choose from 32 Colorbond colours.
- Your tank will be delivered by Clark Tanks to any accessible site (free delivery to most areas). Outlets can be drilled in by the company driver exactly where you want it. Due to their strength, your tank can even sit on a bed of crusher dust!
Our Certifications
Clark Tanks manufactures a certified range of water tanks that comply with AS/NZS 4766:2020. We are also certified to ISO 9001:2015, demonstrating our commitment to quality, consistency and continuous improvement.Your Tank Quality Assurance
As a manufacturer operating under an ISO 9001:2015 certified quality management system, Clark Tanks undergoes regular independent audits to verify that our quality management processes meet the requirements of the standard. Quality assurance measures throughout our manufacturing process include:- Measurement of tank wall thickness at multiple critical locations.
- Impact testing to verify material performance and manufacturing quality.
- Detailed visual inspections to identify any manufacturing defects or abnormalities.
Is Your Tank Really AS 4766 Certified?
The Australian Standard 4766 requires that 2 in every 10 water tanks prAS/NZS 4766:2020 certificationoduced with a capacity of 5000 litres or less must undergo an impact strength test and an ultrasound thickness test. Every single tank produced with a capacity larger than 5000 litres must undergo an impact strength test and an ultrasound thickness test. Here are some basic ways that you can tell whether a poly tank complies:- tanks must be constructed as one piece (there should be no seams).
- radius of corner at tank’s base must be a minimum of 25mm for tanks with a diameter of 1.8m.
- tanks over 1.8m diameter radius must have a minimum of 38mm.
- an installation guide must be supplied with every tank.
- serial numbers must be marked on every tank.
Commitment to Quality Standards
The Clark Tanks commitment to quality demands that we test every tank. Each individual poly tank that we sell must pass three tests before leaving the factory floor:Ultrasonic Thickness Testing
An ultrasonic measuring device is used to determine the thickness of our tanks to within 0.1mm accuracy. At Clark Tanks we use this device on 10 sections of the tank including areas of the lid, wall and base. The Australian Standard requires that no section be thinner than 4.5mm. All Clark Tanks’ water tanks exceed this standard. We additionally test areas around the tank of a similar height. This verifies our tanks are a consistent width all the way around which ensures long-term durability.Impact Testing
This measures the impact strength of the plastic used which ensures that the tank has been made correctly and is not brittle.- When the inlet strainer is cut from the tank, two samples are removed to be used for impact testing..
- The samples are allowed to cool slowly at room temperature for 24 hours, then cooled to -40° Celsius for 6 hours to stress the polymer chains to their limits.
- A 9kg dart is then dropped onto each sample to test the material strength. If a sample cracks or is pierced then the tank fails the test and will not be sold.