for a quick no obligation quote call
020 8930 5668 or enquire using the form below

Rainwater Harvesting

What is Rain Water Harvesting?

Rain and water harvesting collects and stores water for reuse.

How Does Rain Water Harvesting Work?

  • Rainwater falls on the roof and flows along gutters through down pipes into a tank where the water is then collected
  • The water is filtered by an integrated filter
  • The filter captures nearly all the water
  • This removes unwanted particles from the rainwater
  • The filtered water is then directed down through the calmed inlet to the bottom of the tank
  • The water is deflected upwards purifying the existing tank water
  • This ensures a natural biological process takes place.

Rainwater collected on the roof of an average sized house can save up to 50% of households’ domestic needs. Both domestic systems and commercial systems can be implemented.

Advantages of Rain Water Harvesting

  • Collecting and using rainwater reduces surface water by 60% per house plot
  • Purifies water without having to use chemicals
  • Less energy is needed, pollution and CO2 emissions
  • Reduces demand on rivers and groundwater
  • Rainwater is soft, and leaves no limescale; less detergent is needed for washing clothes
  • Rainwater contains no chlorine which benefits plants
  • Large scale rainwater can reduce the risk of flooding.

Disadvantages of Rain Water Harvesting

  • The rainfall can be unreliable in this country- needs to be a minimum of roughly 2000 mm/year and should be spread in at least two (long) rain-periods of three months without total drought in between
  • Cost per capita is higher for a rainwater harvesting system than for a communal pump or well
  • Communication with the installer/ retailer is important for maintenance
  • Cost of setting up the gutter- existing gutters may need replaced
  • Large, non- leaking storage containers are needed
  • Mould can grow if rainwater is left for long periods of time
  • Can also attract insects to snakes- this can be prevented if used within 60 days of collection.