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from roofs, terraces and balconies and put it to work within the building itself. Water collected across these surfaces’ feeds into a buried attenuation tank, pipe ensures that during periods of heavy rainfall, any excess water can discharge safely into the surface water network without overwhelming the system. From the tank, a transfer pump moves the stored water through a multi-stage treatment process before it reaches a polished water cistern. This process polishing to remove any remaining colour ensures the water achieves the quality required for non-potable applications before it is distributed throughout the building. The result is a system that transforms
what would otherwise be a wasted resource into a reliable supplementary water supply, reducing reliance on mains water while making productive use of every rainfall event. For public sector developments
with large roof areas, such as schools, libraries or community facilities, rainwater harvesting can provide a substantial supplementary water source.
This reduces demand on mains supplies while helping to manage stormwater runoff. The potential of greywater recycling Greywater systems take water from sources such as sinks, baths and showers and treat it for reuse within the building. The recycled water can then be used for applications including toilet Public sector buildings often generate every day, making these systems particularly effective in high-occupancy environments. When integrated during the early
stages of design, greywater systems building’s infrastructure, delivering long-term environmental and its lifespan. Designing for long-term resilience As sustainability requirements become increasingly being considered alongside energy performance and carbon reduction. While net-zero carbon initiatives rightly remain a major focus, the resilience of water supplies must also form part of the conversation. Early collaboration between architects, engineers, contractors and local authorities is essential to identify the most appropriate water-saving measures
for each project. By integrating water harvesting and recycling systems during the design phase, organisations can Water scarcity is no longer a future
concern, it is an emerging reality that are planned, designed and operated. role to play in reducing demand on the UK’s water resources while creating resilient, future-ready communities.
WG222
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