In order to work they require water tanks to be filling while hot water is draining, so the functional use of these units is pretty well limited to the shower, with a bath your water tank is refilled long before you drain tub. If you aren't familiar with the term, greywater heat recovery devices, as their name suggests, are used to recover heat from drain water before it is discharged from homes. Greywater treatment systems need to be maintained with regular servicing and filter replacements.Sustainable construction is on the move! It seems almost every day a new and innovative product shows up on the market that is more efficient, more effective, greener and healthier. We regularly cruise the web looking for such gems and our latest find is a new system for greywater heat recovery that looks quite promising. If you are thinking of installing a treatment system please talk to one of our environmental health officers. Treatment systems also require an approval from Council. Greywater treatment systems must have a Certificate of Accreditation issued by NSW Health. These types of systems can be used to recycle water to the toilet and washing machines. Treatment may include filtration, removal of chemicals and disinfection by chlorination or UV light. These systems collect and treat the water to various levels of purity and hygiene. Do not water herbs or vegetables with greywater. Stop using greywater when someone in the family is sick with gastroenteritis or another contagious disease, or during rain periods. There are limits to what you can do with untreated greywater because of the chemicals and bacteria in it. Untreated greywater should only be used for sub-surface garden irrigation - that is, through a network of pipes buried at least 100mm below the ground – to reduce the risk of human or animal contact. No council approval is required provided that the greywater diversion device has a WaterMark licence. There are two types of greywater recycling systems Diversion devicesĭiversion devices redirect greywater for reuse outside on garden or lawns without treating it. Greywater should not escape from your property into a neighbouring one, into stormwater systems or aquifers used for drinking water - in fact it is illegal. Greywater recycling systems can only be installed on a property that is connected to sewer. It has a higher load of chemicals, fats and organic matter. Water from a dishwasher and / or the kitchen sink is referred to as dark greywater. Greywater is the wastewater from your shower, bath, hand basin, laundry tub and washing machine. NSW Water publishes guidelines on greywater reuse, including figures to help you calculate your water use and needs. There are many things to consider if you are to use greywater safely. The characteristics of greywater are influenced by the number of occupants, lifestyle and water usage patterns. For these reasons rainwater tanks are preferred. Such as environmentally sensitive land, escarpment areas, areas that have rare plants or threatened species, where soils are shallow or on properties in close proximity to waterways. There are some areas that are not suitable for greywater recycling.
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