Our Underground Rainwater Harvesting Tank collection represents the gold standard in modern water management. By moving your water storage below ground, you can store massive volumes—up to 30,000 litres or more—without taking up a single square inch of garden or driveway space. These systems are ideal for new builds, major renovations, and properties looking to maximize their environmental sustainability and long-term water independence.
Many of our underground tanks, such as the F-Line Flat Tank series, feature a specialized "shallow-dig" design. Unlike traditional spherical tanks that require deep, dangerous excavations, flat tanks only require a shallow trench. This results in:
Lower Installation Costs: Less soil to remove and less backfill required.
Higher Safety: Reduced risk during the digging process.
Versatile Placement: Can often be installed in areas with a high water table where deep tanks would be prone to "floating."
We don't just sell tanks; we provide complete Rainwater Harvesting Packages that include everything needed for a professional setup:
Integrated Filtration: High-performance leaf filters are built into the tank turret to remove debris before the water enters.
Submersible Pumps: Silent, powerful pumps located inside the tank provide high-pressure water to garden taps or internal plumbing.
Mains Water Backup: Advanced control units (like the Rain Director or Backup in a Box) ensure that if the tank runs dry, the system automatically switches to mains water, so your toilets never stop flushing.
Calmed Inlets: These ensure that incoming water enters the tank without disturbing any fine sediment at the bottom, keeping your water clear.
Beyond the space-saving benefits, underground storage offers superior water quality. Because the tank is buried, the water is kept in total darkness and at a constant cool temperature. This naturally inhibits algae growth and bacterial development, ensuring the water remains fresh and odorless for much longer than in above-ground units.
Installing an underground rainwater system often helps developers meet SuDS (Sustainable Drainage Systems) requirements and improves a property’s "green" credentials. In a world of rising utility costs and frequent hosepipe bans, a high-capacity underground reserve is a significant asset that adds long-term value and resilience to any home or commercial building.
