Underground storage
A purpose-designed tank stores collected roof water below ground, preserving space at the surface.
Rainwater harvesting
Store rainwater for use around the property
Advice, supply and installation of underground rainwater storage systems for domestic properties across Sussex and nearby Kent.
Make better use of the rain that falls on your roof
Harvested rainwater can reduce reliance on mains water for suitable non-drinking uses, particularly garden irrigation. If the priority is surface-water disposal rather than reuse, our soakaway guidance explains the alternative.
Planned for the property
Tank size, siting, access, roof collection area and intended use all shape the recommendation.
Complete groundworks
Excavation, base preparation, positioning, connections and reinstatement can be coordinated as one installation.
A recent GRAF system
From delivery to a tank installed below ground
The photographs supplied for this page show a large GRAF rainwater harvesting tank before and during installation. The final design for any property depends on the available area, ground conditions and how the stored water will be used.
- Review the collection area and proposed use.
- Consider access for excavation and lifting equipment.
- Plan overflow and surface-water management.
- Agree the finished level and reinstatement.
A practical route from idea to installation
We can help establish whether a buried storage system is suitable and what should be included in the scope.
Discuss intended use
Tell us where the water comes from and how you hope to reuse it.
Assess the site
We consider access, levels, ground conditions and the available installation area.
Select the system
Storage, filtration, pumping and connections are matched to the agreed use.
Install and hand over
The tank and associated groundworks are completed to the agreed finish.
Rainwater harvesting should be designed around the site
The Environment Agency describes harvested rainwater as water collected from roofs or other above-ground surfaces and kept isolated from inland waters and groundwater. Any proposal still needs to suit the property and intended use.
Ask about rainwater harvesting
Tell us about the property, the available space and how you would like to use the stored water.