The terms rain water harvesting and "grey water recycling" have become synonymous with terms such as water-wise gardening, garden irrigation, landscaping and even drinking water.

These terms all have one common denominator. They are all based on the availability of our most natural resource.. fresh water. Apparently this totally natural resource is becoming depleted at a rate impossible for humans to beat. But is this really the case

Until recently the harvesting of rain water used to be practiced mostly as a money saving concept but these days it is fast becoming a necessity not only to save money but to save the environment and more importantly to save the resources from which we obtain this basic life-giving substance we call water.

Population growth, both globally and locally, are the main culprits causing this life threatening condition. Although these 2 factors are both global issues, population growth is almost unstoppable whereas saving the environment is a real possibility. Rain water harvesting and grey water recycling are the immediate answers to the riddle of saving our natural water resources.

Various methods exist for saving our precious water resources. These include:

Rainwater harvesting

This is the process by which one adapts ones roof guttering to effectively channel as much rain water as possible into rainwater storage tanks placed strategically around the house. One large storage tank (5 000L volume, for example) could suffice provided the roof is a single structure and theres enough elevation/clearance for a gravity fed system to converge into 1 pipe which will fill the tank. A double storey house would typically require this kind of system. If the roof is low (single storey house) and or separated by flat sections or the house is built in sections, then numerous rain water storage tanks will be necessary. These tanks would then need to be connected via a piping system unless they are strategically placed to supply different parts of the garden and or the house (ie: stand-alone systems).      

Placement of these rain water storage tanks is crucial considering they must be unobtrusive yet functional since they need to collect as much rain water as possible and also be in a good position to act as a supply vessel from which to pump or boost the harvested water to the garden (or a specific area) or the house water mains supply.    

Show Gardens builds and installs systems developed by an Australian company called Rain Harvesting Pty Ltd. These systems are industry specific and were designed for the sole purpose of harvesting rainwater. This quality range of rain harvesting products is manufactured to the highest standards and specifications and provides clean harvested rain water and low tank maintenance for the owner. See the

Greywater treatment / recycling

The term greywater refers to the water used during bathing, washing of clothes, laundry and dishes, cleaning of floors in the house, etc. All this water can be collected and diverted to an underground wastewater storage tank called the Biorock Box.  

The Biorock Box is a 2 stage filtration system comprised of 2 in-ground gravity fed separation tanks. The first tank collects the waste water via a gravity fed piping system. This basically means that the storage tanks are installed underground and downhill from the source which would typically be the house or a washroom, scullery, etc. There is an effluent filter in this tank which separates solids from the liquid part of the effluent and prevents solids from exiting the tank.The sediment settles at the base of this tank and as the level inside the separation tank rises it approaches an overflow section which allows the cleaned effluent to flow over into the 2nd tank.    

This tank contains alternate layers of air passages as well as natural stone fibre contained in nets which collectively treat the effluent with air and bacteria which grows inside the stone fibre. The bacteria breaks down and decomposes the organic material so that only cleaned water exits the system.