Rain Activ sustainable drainage system

Due to recent flooding incidents, effective drainage strategies have become more important when it comes to local planning.

Rain Activ is an innovative new SuDS (Sustainable Drainage System) that can be used independently or in conjunction with Rainwater Harvesting. Rain Activ is delivered with SuDS run off values, which must be submitted with planning applications. It is able to temporarily store between 750-15,000L of run off water, depending on individual site requirements.

Rain Activ utilises a custom built SuDS/filtration element with two sections, an upper and lower section. The upper area filters water from the roof space before it enters the tank. The lower controls the SuDS of Rain Activ.

On top of the lower SuDS Chamber is the flow control valve. When water reaches this it will be released from the tank at the predetermined discharge rate. Water below the SuDS chamber will be stored for traditional Rainwater Harvesting.

Systems are bespoke designed to meet our customer’s requirements, based on individual site drainage figures. Rain Activ is capable of dealing with a ‘1 in 100 year’ storm effectively. The volume of water stored can be altered by increasing the height of the SuDS chamber. The run off rate is adjusted by modifying the size of the SuDS inlet.

The system has succeeded in reducing SuDS costs during planning, purchase and installation.  The unit arrives at site fully assembled and ready to install, and the professional calibration process uses Micro Drainage calculations as part of the cost package.

There are no moving or consumable parts and the filter is very low maintenance. The water release rate can be as low as 0.05l/sec. Finally, a rainwater harvesting system for non-potable water can be added for a small additional cost.

Visit our website to find out more about Rain Activ.

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