Filters

Rainwater Harvesting Tanks

74 products

Showing 49 - 72 of 74 products

Showing 49 - 72 of 74 products
View
FREE Delivery*
7000 Litre Underground Rainwater Harvesting Tank - Home + Garden7000 Litre Underground Rainwater Harvesting Tank - Home + Garden
FREE Delivery*Save £684.00
7500 Litre GRAF PLATIN AA-Silento Underground Rainwater Harvesting System7500 Litre GRAF PLATIN AA-Silento Underground Rainwater Harvesting System
7500 Litre GRAF PLATIN AA-Silento Underground Rainwater Harvesting System
Sale price£3,930.00 Regular price£5,400.00 exc. VAT
FREE Delivery*
7500 Litre GRAF PLATIN Garden Comfort Underground Rainwater Harvesting System (Garden Irrigation)7500 Litre GRAF PLATIN Garden Comfort Underground Rainwater Harvesting System (Garden Irrigation)
FREE Delivery*
7500 Litre GRAF PLATIN Direct Underground Rainwater Harvesting System (Home & Garden)7500 Litre GRAF PLATIN Direct Underground Rainwater Harvesting System (Home & Garden)
Save £1,561.20
Atlantis 8400 Litre Underground Rainwater Harvesting System - Garden IrrigationAtlantis 8400 Litre Underground Rainwater Harvesting System - Garden Irrigation
Atlantis 8400 Litre Underground Rainwater Harvesting System - Garden Irrigation
Sale price£3,323.00 Regular price£5,548.80 exc. VAT
Save £1,317.60
Atlantis 8400 Litre Underground Rainwater Harvesting System - Home & Garden IrrigationAtlantis 8400 Litre Underground Rainwater Harvesting System - Home & Garden Irrigation
FREE Delivery*
8500 Litre GRAF CARAT Garden Comfort Underground Rainwater Harvesting System (Garden Irrigation)8500 Litre GRAF CARAT Garden Comfort Underground Rainwater Harvesting System (Garden Irrigation)
FREE Delivery*
8500 Litre GRAF CARAT Direct Underground Rainwater Harvesting System (Home & Garden)8500 Litre GRAF CARAT Direct Underground Rainwater Harvesting System (Home & Garden)
FREE Delivery*
10000 Litre Underground Water Tank10000 Litre Underground Water Tank Top
10000 Litres Underground Rain Water Tank
Sale price£2,950.00 exc. VAT
FREE Delivery*Save £519.12
10000 Litre GRAF PLATIN AA-Silento Underground Rainwater Harvesting System10000 Litre GRAF PLATIN AA-Silento Underground Rainwater Harvesting System
10000 Litre GRAF PLATIN AA-Silento Underground Rainwater Harvesting System
Sale price£5,417.40 Regular price£7,020.00 exc. VAT
FREE Delivery*
10000 Litre Underground Rainwater Harvesting System - Garden Irrigation10000 Litre Underground Rainwater Harvesting System - Garden Irrigation
FREE Delivery*
10000 Litre Underground Rainwater Harvesting Tank - Home + Garden10000 Litre Underground Rainwater Harvesting Tank - Home + Garden
Save £1,811.20
Atlantis 10000 Litre Underground Rainwater Harvesting System - Garden IrrigationAtlantis 10000 Litre Underground Rainwater Harvesting System - Garden Irrigation
Atlantis 10000 Litre Underground Rainwater Harvesting System - Garden Irrigation
Sale price£3,827.00 Regular price£6,403.60 exc. VAT
Save £1,567.20
Atlantis 10000 Litre Underground Rainwater Harvesting System - Home & Garden IrrigationAtlantis 10000 Litre Underground Rainwater Harvesting System - Home & Garden Irrigation
Enduramaxx 10000 Litre Underground Rain Water Tank
FREE Delivery*
10000 Litre GRAF CARAT XL Direct Underground Rainwater Harvesting System (Home & Garden)10000 Litre GRAF CARAT XL Direct Underground Rainwater Harvesting System (Home & Garden)
FREE Delivery*
10000 Litre GRAF PLATIN XL Direct Underground Rainwater Harvesting System (Home & Garden)10000 Litre GRAF PLATIN XL Direct Underground Rainwater Harvesting System (Home & Garden)
FREE Delivery*
10000 Litre Underground Flat/Shallow Dig Rainwater Tank - Graf Platin XL10000 Litre Underground Flat/Shallow Dig Rainwater Tank - Graf Platin XL
FREE Delivery*
15000 Litre Underground Water Tank15000 Litre Underground Water Tank Lifting Points
15000 Litre Underground Rain Water Tank
Sale price£3,600.00 exc. VAT
FREE Delivery*
15000 Litre Underground Rainwater Harvesting System - Garden Irrigation15000 Litre Underground Rainwater Harvesting System - Garden Irrigation
FREE Delivery*
15000 Litre Underground Rainwater Harvesting Tank - Home + Garden15000 Litre Underground Rainwater Harvesting Tank - Home + Garden
FREE Delivery*
20000 Litre Underground Flat/Shallow Dig Rainwater Tank - Graf Platin XL20000 Litre Underground Flat/Shallow Dig Rainwater Tank - Graf Platin XL
A general rule of thumb is to look at your roof area and average local rainfall. For a standard garden, a 1,000L to 2,500L tank is usually sufficient. For commercial use, we recommend a capacity that can store at least 18 days of your average daily water requirement.
While both collect rain, a harvesting tank is typically larger, made of thicker industrial-grade plastic, and often features specialized 'calmed inlets' and overflow siphons to improve water quality and allow for pump integration.
Yes, a filter is essential. It prevents leaves, moss, and debris from entering the tank, which keeps the water clear and prevents the buildup of sludge that can smell or damage pumps.
Yes, but this requires a more advanced 'Header Tank' or 'Direct Feed' system with a pump and a mains-water backup to ensure you still have water when the tank is empty. It also requires dedicated pipework clearly marked as non-potable.
Our tanks are made from opaque, UV-stabilized plastic which blocks sunlight. This prevents algae growth. Combined with a good pre-tank filter, the water will stay fresh and clean for long periods.
The tank must be placed on a flat, level, and fully supported base—usually a 100mm-150mm thick concrete pad. This is vital because a full 5,000L tank weighs 5 tonnes; an uneven base could cause the tank to split.
Absolutely. You can 'daisy-chain' tanks at the base using a linking kit. This allows them to fill and empty at the same level, effectively increasing your total storage capacity.
If you only want to fill a watering can, a gravity-fed tap is fine. However, if you want to use a hosepipe, sprinkler, or supply water to a building, you will need a submersible or external surface pump.