1. What is Grey Water?

Grey water is untreated water discharged from your showers, basins, and laundries.

Kitchen waste water has harmful amounts of fats and oils which may have an adverse effect on your soils therefore it is not normally considered as grey water unless its first put through a grease trap to remove fats and oils.


2. How much grey water do I generate?

On average, Australians produce 120 liters of reusable grey water per person per day day. So a typical household of four can produce 3,360 liters per week. That's the equivalent of over 33 full baths or 3,360 1 liter cartons of milk per week!


3. Will grey water affect my plants and my soils?

It is strongly recommended to use grey water friendly detergents with low phosphorous and low salt content.

Earth Choice, Organic Care and Natures Organics branded products, found in popular supermarkets, are greywater safe (other than Earth Choice dishwasher tablets).


4. Can I water my lawn area with grey water?

Sub-surface irrigation of lawns using grey water has been achieved successfully in many places. The Grey Flow systems do not come with any long term protection against root intrusion. Solutions such a trifluralin impregnated drippers (rootguard) or filters (tech-filters) are available to protect from root intrusions and should be used with sub-surface irrigation of lawn areas. (Please contact us for more details)


5. How do I install a GreyFlow system?

If you have an existing property then your licensed plumber can help you install your GreyFlow plug & play system. Although the systems are very easy to install and come with easy instructions manuals, we recommend that you contact us first for free expert advice on both system installation and irrigating your landscaping. 

If you are building then your builder can use our builder's kit systems, 


6. How much maintenance work do Grey Flow systems require?

Grey Flow systems come with automatic self-cleaning option (except for G-Flow). This reduces the standard maintenance cleaning work from every 2 to 3 months to once every year.  Systems without automatic self-cleaning typically require filters to be cleaned every 2 to 3 months. 


7. Can I connect Grey Flow systems to my existing irrigation system?

Standard irrigation systems cannot cope with the untreated Grey Water. Cross connection is not allowed. Connecting to a non-approved irrigation system will result in failure and void of warranty. We provide free expert advice and complimentary system design. 


8. Can I water a garden area smaller than the required minimum?

Each country or state may have different guidelines pertaining to the minimum disposal area required for the reuse of Grey water. These minimum areas have been set so as to protect the ground water resources and our environment (please refer to your local regulations). It is however possible to reduce the number of fixtures connected to your grey water outlet pipe, in order to help in reduce the amount of grey water generated. This will allow for a reduced minimum irrigation area requirement.


9. Can I water a garden area larger than the recommended maximum?

Yes it is possible but your garden may not get enough water during the peak summer months. To remedy this situation you can provide a top up system. The use of multiple stations with the grey flow systems should be done through the use of a manual 3 way valve or a Grey Flow rotor hydraulic indexing valve. Automated solenoid valves should not be used as they are not designed to cope with the poor quality of the grey water.