Graf UK are specialists in stormwater management and below ground water storage systems. Their products are widely specified in SuDS compliant drainage schemes where control, storage and gradual release of surface water is required.
Graf soakaway crates and attenuation systems are modular and designed to create high void ratio underground storage. They are installed within excavations and typically wrapped in a non woven geotextile membrane for infiltration systems, or an impermeable geomembrane for attenuation and controlled discharge setups.
In domestic applications, Graf systems are commonly used for driveway drainage, roof water management and extension builds where additional hardstanding increases surface runoff. On clay soils with poor natural drainage, an attenuation system with controlled outlet is often more appropriate than a simple soakaway.
Commercially, Graf attenuation tanks are installed beneath car parks, roads and industrial yards. Correct specification depends on ground conditions, loading class and required storage volume. Structural integrity of the surrounding backfill and correct membrane protection are critical to long term performance.
Rainwater harvesting tanks from Graf are used to collect and reuse roof water for irrigation, wash down areas and non potable supply.
Graf systems manage water effectively, but performance relies on correct excavation depth, base preparation and appropriate geotextile or geomembrane selection to prevent clogging or leakage.
