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Rainwater Harvesting. CORK GLASS LTD. Introduction. Cork Glass have 8 machines that use either fresh or recycled water as a coolant as part of the production process. This created a demand that outweighed the public supply. Harvested rainwater can be used for all non drinking water uses.

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rainwater harvesting

Rainwater Harvesting

CORK GLASS LTD

introduction
Introduction
  • Cork Glass have 8 machines that use either fresh or recycled water as a coolant as part of the production process.
  • This created a demand that outweighed the public supply.
  • Harvested rainwater can be used for all non drinking water uses.
water intake1
Water Intake
  • The downpipes are connected to a bank of storage tanks.
  • Each tank has an 1100 litre capacity.
  • Capacity can be varied by the number and size of tanks.
  • These tanks are supported by steel girders on block on flat columns.
overflow system
Overflow system
  • An overflow pipe discharges excess water to the storm water drainage system.
pressure
Pressure
  • By positioning tanks up off the ground, a pressure can be maintained.
  • This is sufficient to flush toilets, feed showers, sinks, irrigation units.
  • We use a small pump to increase pressure to 3 bar.
cost benefit analysis
Cost benefit analysis
  • Water charges are based on “water-in water-out” at a cost of approximately €2 per Cubic Meter of water.
  • Water is metered as it comes into a building and therefore charges also apply to dispose of it. Harvested rainwater by-passes this system as there is no charge for disposing of it.
set up costs
Set-up costs
  • All labour and installation was performed by our staff so costs were kept to a minimum.
  • Tanks €2500
  • Plumbing materials etc €1000
  • Total cost €3500
  • Due to the simplicity of the system, there are little, if any maintenance costs.
environmental benefits
Environmental Benefits
  • Every litre of tap water we use adds to our own carbon footprint.
  • This water must be treated, pumped and transported great distances just to be flushed away.
  • It makes sense, where possible, to use the natural resource on our doorstep.