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Rainwater Harvesting





Rainwater Harvesting is the collection of rainwater that falls onto your roof and rather than being wasted down the drain, the rainwater passes through a filter (to remove leaves and debris) and is then directed to a storage tank.  This harvested rainwater is pumped into the house to be used for non-consumptive applications such as toilet flushing and washing machines.  Outdoor taps can also be connected to this storage tank.  Rainwater harvesting systems can be installed to new or existing dwellings.  Now with the introduction of water metering, it might be wise to consider rainwater harvesting, which can save you up to 50% of your potential water bill.

WHAT IS INVOLVED?rainwater harvesting image

The rainwater that falls onto the building’s roof is channeled through standard gutters and pipes to the storage tanks.  Rainwater storage tanks and fittings are required to store and filter the captured water, which can be located either above or below the ground.  Above ground tanks provide the quickest and simplest facility for storing harvested rainwater.  Below ground tanks are more commonly used for water storage as they are more discreet with the tank and piping hidden underground. There are a number of different systems available, such as the Gravity System (which involves a header tank in the attic supplying the appliances) and the Direct System (which feeds each of the appliances directly).  If the harvested rainwater runs low, these systems automatically switch to the mains water, thereby ensuring that a constant water supply is maintained without intervention from the user.  On the other hand to prevent the storage tank overflowing an overflow pipe is directed to a soak away or surface water drain.  The rainwater that falls onto the building’s roof is channeled through standard gutters and pipes to the storage tanks.  It would be advisable to discuss the installation procedures and system types with a reputable company to see which option is most favourable to your dwelling, refer to our directory.


Yes. Greywater recycling is another option of water harvesting.  Most greywater recycling systems collect wastewater from showers, baths and wash hand basins, excluding the more contaminated water from washing machines, kitchen sinks and dishwashers.  This water is firstly treated and then stored and used as described above.  Since greywater is originally derived from the use of mains water, the storage capacity is not dependant on rainfall and thus can be topped up all year round.  It should be noted that all systems that store greywater have to incorporate some level of treatment as untreated greywater deteriorates rapidly in storage. Filtered greywater is true recycling as the water has previously been used.   


Yes. By either using a Rain Trap or Rain Water Butts.  A Rain Trap is a relatively inexpensive undergroundwater butt image rainwater storage and delivery system for outdoor use. It is less expensive as the tank is less complicated and no plumbing is required within your home.  The Rain Trap will collect and filter the rainwater as described above.  Then a simple on/off switch will operate an integral pump, allowing the stored water to be delivered under pressure to where it is needed via a hose.  The system can be used to water the garden, operate a sprinkler, wash the car etc.
Rain Water Butts are the simplest and most inexpensive way of harvesting rainwater from your roof.  The water butt is connected to a downpipe so that it collects the rainwater from the gutters of your house or shed.  Taps are located close to the bottom of the rainwater butt.  It is best to place the rainwater butt on a stand, so a watering can or bucket can be placed underneath for filling.  There are a wide variety of rainwater butts available including some with decorative finish that will blend in with your surroundings. 

Please refer to our Directory for suppliers and installers of the above products


  © Matt Fitzpatrick | Site by Big Push Design