Rainwater Harvesting – How does it work?

There are many different rainwater harvesting systems on the market in Ireland. The basic principles of operation are as follows:

  • Rainwater is collected from the roof drainage system, the debris is filtered out and the water is stored in a tank.
  • Water is supplied on demand from the storage tank by a submersible pump through a filter to a header tank or storage unit.
  • Where rainwater does not meet the water demand, mains water top up is provided directly to the header tank or storage unit and controlled by a solenoid valve.

NOTE: Harvested rainwater is not suitable for drinking, cooking, hand washing, showers, baths etc.