Technical Options
Waterco specialises in providing a distinct comparison and impartial advice service for commercial retro-fit RWH applications.
We recognise that commercial new-build developments sometimes require this service too, as it is often beneficial from a design point of view, allowing for greater utilisation of captured rainwater.
To determine the specific requirements of the project, whether it is retrofit or new build, several considerations have to be made:
The Building
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Roof size and daily water volume usage - to select required storage capacity.
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Distance between storage and furthest outlet - to identify the need for pressurisation.
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Existing stormwater attenuation - could be adapted to provide RWH.
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Intended Water Use
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For drinking (potable) - requires UV cleansing and sediment filtering.
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Toilet Water, Process Water, Irrigation, Fire Reserves (non-potable).
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Where water usage warrants, Greywater Recycling (waste from basins, baths, showers and washing machines etc.) is a viable option to be considered in addition to RWH.
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Site Restrictions
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Space available - suitability for an above/underground storage tank, and space for a gravity header tank inside the building.
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Water table level - can cause empty underground tanks to rise if high.
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Tank placement - to select appropriate material and wall thickness (integrity when full above ground or empty underground), and to identify need for compression resistant subsurface tanks to allow vehicular activity above.
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Technical Aspects
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Intended energy usage - lower for gravity fed systems, however renewable energy devices (i.e. solar panels) can be implemented to power electrical components.
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System conformity to British Standards (BS 8515:2009, BS EN 13076), UK water byelaws and best practice guidelines.
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For more information, please contact our team for an informal discussion.
