Our OASIS rainwater harvesting tanks are made of a high quality fibreglass:
Fibreglass, unlike polyethylene or plastic, does not distort and bend under pressure. Unlike most of our competitors who supply German tanks, OASIS rainwater harvesting tanks are manufactured in the UK, giving jobs to UK citizens and have a 30 year tank warranty (with a professional and competent rainwater harvesting installation).
OASIS Rainwater Tanks are a one piece tank construction:
Unlike most of the competition, whose storage tanks are made in 2 halves (easier to import) and joined together on-site, increasing the risk of leaks and splits over time. Click here to view the complex video on how to join two-piece rainwater tanks together. All the complex stages must be done perfectly, often by the groundworkers on site and often in muddy conditions! The durability and long life expectancy of OASIS rainwater tanks is due to this one-piece construction. All OASIS rainwater harvesting tanks are supplied with a child safe screw down lid as standard.
The tank sizes are as follows:
- 1500 Litres
- 2800 Litres
- 3600 Litres
- 4500 Litres
- 6000 Litres
- Increments of 1000L above this 6000L size right up to 275,000L
Our rainwater harvester tanks are also available in two types:
- Class 1 - This is for installation with a simple gravel backfill, or on a concrete base with gravel backfill for shallow installations
- Class 2 - For full concrete installation
Class 1 tanks are cheaper to install, but if you are siting the tank under a driveway, you will need to fully surround any tank with concrete, so cheaper Class 2 tanks would then be the better choice.
Installation Manuals
Class 1 Rainwater Harvesting Tanks
Class 2 Rainwater Harvesting Tanks
All OASIS rainwater harvester tanks are pre-fitted with all the necessary accessories, ensuring a quick and problem free installation. A tried and tested product with a wide range of sizes to fit all needs. | 
