SDS’s WaterBank® Intellistorm® rain and grey water recycling system enables a site to maximise rainwater reuse and minimise discharge to drain, operating entirely under its own control.

The SDS WaterBank® intelligent rain- and grey- water recycling system provides an integrated water management and delivery platform to enable the distribution of treated rain- and grey- water to a single or multiple end user application.

This fully automated system prioritises grey water, then rainwater and lastly mains water as the fail-safe back-up in order to provide a seamless supply of water through periods of rainfall, drought and absence of grey water supply.

This is enabled by storing and using collected rainwater for non-potable applications such as toilet flushing, irrigation, vehicle cleaning, manufacturing and cooling systems, whilst creating storage capacity for stormwater that might otherwise overwhelm and flood the drainage system. The system interprets and assesses weather forecasts along with expected rainfall and local catchment data and responds accordingly.

Key features

  • Supplies up to 25m3/hour rainwater and 12m3/hour grey water

  • Single system control unit with individual HMIs

  • Live rainfall forecast received

  • Tank level gauges and displays

  • Variable speed pumping available

  • Submersible or dry-mounted pumps or valves (for water reuse transfer)

  • Volt-free and Modbus BMS output capability

  • Meets BS EN 16941-1:2018 and BS8525 requirements

Reduced costs

SDS WaterBank Intellistorm® reduces by as much as £100,000 the cost of integrating water reuse into a new build development where attenuation already exists, encouraging the take-up of water reuse.

Lighter footprint

Cost isn’t the only key factor; the Intellistorm® system presents no additional equipment footprint or civil excavation associated with a second tank, allowing space to be removed as a barrier in the decision to integrate water reuse.

How it works

Automatic controlled discharge

Unlike traditional attenuation systems which temporarily attenuate stormwater and allow a continuous controlled discharge of any collected surface water, Intellistorm® system actively empties in accordance with weather forecast data. It provides only sufficient space in the tanks to receive the incoming rainwater and ensures the maximum amount of water for reuse is continuously available.

Integrated water harvesting and stormwater attenuation

SDS Intellistorm® puts water reuse well within the reach of every project where SuDS are a planning requirement. Where a new build development needs to consider both flood resilience and water consumption impact, there’s no need for separate rainwater harvesting and attenuation systems.

By combining two systems and using intelligent data, significant savings in construction costs are achieved, while spatial restrictions to accommodate large water storage volumes are mitigated. Plus, end users achieve ongoing cost savings through water reuse and the wider environment and society benefit from increased flood resilience.

Greywater recycling option

Furthermore, Intellistorm® rainwater management system can be extended to incorporate grey water recycling, thereby reducing to an even greater extent the demand on potable water supply, increasing self-sufficiency, reducing carbon footprint and maximising environmental and Corporate & Social Responsibility credentials.

Features and benefits

  • Provides sources of water other than the mains water supply. Protects the supply of increasingly scarce treated drinking water. Reduces water supply fees and carbon footprint. 

  • Reuses water that might otherwise have contributed to flooding and actively controls the release of excess water. Limits the impact of uncontrolled rainwater on the natural environment and engineered drainage infrastructure.

  • Manages stormwater attenuation and rainwater harvesting in one tank. The additional space and storage capacity normally demanded by extra rainwater harvesting volume, together with the costs of associated materials and land take, are avoided. 

  • Live rainfall forecast received in mm/24 hours. Continuous monitoring of rainfall forecasts ensures any expected changes in weather are accommodated. 

  • Automated calculation of spare capacity for attenuation with programmable safety levels. Provides control of tank water levels to optimise water reuse efficiency (via predictive weather forecasting). Constantly creates and maintains required tank void.

  • Releases water into the public sewers before the expected storm event. Minimises the load on the public sewers during storm events.

  • Control software incorporates level sensors. Ensures rain- and grey- water are prioritised as the primary water source. 

  • Integral treated water tank features a WRAS-approved mains valve with an AA air gap. Ensures a constant water supply is achieved by inteswitching to mains water when rain- and grey- water are unavailable.

  • Compatible with above- or belowground tank installations. Suitable for use in all building types (subject to max distances).

  • Recommended for partnering with SDS supplied water tanks. Conforms to BS and Water Supplies (Water Fittings) Regulations (when partnered with SDS-supplied tanks).

  • Choice of attenuation and collection tanks’ sizes, shapes and manufacturing materials according to site requirements or specification preferences. System can be used with any type of attenuation and storage tanks.

  • System is supplied from a transfer pump typically located within the rainwater storage tank. Ensures that the bulk of the stored water is kept in cool conditions, usually underground.

  • Bespoke transfer pump sizes available on request. Pump increases or decreases the amount of water supplied for reuse as required.

  • Choice of attenuation pump capacity. Any SuDS discharge limits set by the Water Company or Local Authority are adhered to.

  • Pumps typically submerged in underground tank installations or mounted above-ground when tank is installed in a building basement. Flexible pump locations ensure the system is suitable for all types of project and above- or below- ground installations.

  • 2-stage grey water filtration process by either disc and ultrafiltration or cartridge and nanofiltration. Enables rapid treatment of grey water. Water storage requirements occupy a smaller footprint than MBR systems.

  • Automatic backwash process allied to low level chlorine dosing. Ensure the highest level of water quality.

  • Safe-to-fail operation. System reverts to standard attenuation operation if any safety parameters are exceeded.

  • Variable time control for operation and automatic shut-down. Perfect for variable demand situations and shut-down periods such as over weekends and holidays. System does not require rebooting or recommissioning following shut-down.

  • Optional sub-metering and automated meter reading, including remote volume monitoring, available via SDS SYMBiotIC™ telemetry system. Provides client with 24/7 access to rainwater harvesting and recycling, as well as mains water consumption, data via web-based client portal.