The new StormTech SC-800 arch-shaped chamber from Advanced Drainage Systems (ADS), a global leader in corrugated thermoplastic drainage pipes and a specialist in water management systems; not only holds more water than the company’s current best-selling and most popular chamber – the SC-740 – but also requires less embedment stone for installation, and has a reduced minimum cover depth, resulting in greater storage capacity for the same footprint area and depth, plus reduced construction time and cost.
The SC-800 maximizes storage within a compact footprint while its corrugated design pares down the minimum cover depth and provides superior structural integrity. The latest development in the company’s drive to reduce footprints sees the SC-800 with a 7% smaller footprint than the SC-740 for the same storage volume.
Unlike other below-ground SuDS attenuation systems such as crates and pipes, which allows runoff into the entire tank storage space, the StormTech arch-shaped system directs first flush flow into the patented Isolator Row – an integral water quality treatment device that has two treatment stages: sedimentation and filtration.
Isolator Row is independently tested and validated to remove more than 80% Total Suspended Solids (TSS), often avoiding the need for a costly sediment removal system upstream of the tank. Isolator Row can also remove other pollutants such as particulate-bound hydrocarbons and metals.
Another two treatment stages can take place within the embedment stone: adsorption and biodegradation, leading to even greater removal efficiencies. Isolator Row is the only part of a StormTech system that needs maintenance, as the other chambers only receive ‘clean’ untreated runoff from flows exceeding the first flush flow rate.
Cleaning is carried out at intervals of typically two to five years, depending on local conditions, using standard sewer jetting equipment and a vacuum tanker to remove the waste.
StormTech’s arch design sheds load from the chamber to the surrounding stone, which forms a structural arch that transfers loads into stone columns between the chambers and spreads the load through to the native soil, resulting in extraordinary minimum and maximum cover depths. The new SC-800 chamber has a minimum cover depth of 375mm. All StormTech standard installation details are based on HGV traffic loading.
The design of StormTech chambers means that the units can be stacked, taking up a minimum of space for transportation, storage and to speed-up installation.
By adding SC-800 into the StormTech range, ADS has enhanced design flexibility for SuDS attenuation and storm water management. This innovation exemplifies ADS’s commitment to providing cutting-edge products that meet the evolving needs of the construction industry.
Training and CPDs on below ground attenuation covering legislation, best practice and comparable systems is available from ADS.advance