Home House & Building Reduce, Reuse & Save Recycling of Greywater - Without purification
Recycling of Greywater - Without purification
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Recycling of Greywater
Greywater recycling systems
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Water recycling systems without purification

Water diversion systems

The simplest greywater system is to simply divert the water directly to the garden. Regulations change by country and region, but common guidelines for safe usage include not storing the greywater for more than 24 hours, ensuring it cannot pool or run off, and depositing it with subsurface irrigation. Greywater diversion systems can be both designed-in to new homes, or retrofitted to many existing homes. When systems are fully designed, manufactured and installed to relevant standards such as the Australian Watermark standards. Water diversion systems tend to be highly efficient, effective and safe for simple applications where potable water is not required.

Diversion systems can be as basic as running the outlet hose from a washing machine out a window to the garden, or can be designed in as a permananet part of the home plumbing. Fully engineered systems like the Waterwiseand Garden ResQ systems incoporate a sump pump and surge tanks and deliver the water through sub-surface irrigation.

Greywater from the shower or bath is generally great quality water for the garden. The soap levels at the dilutions typical are actually good for the garden as they are a wetting agent. When laundry greywater is diverted to the garden then the laundry products must be chosen carefully to ensure phosphate and salt levels are low, and the pH balance is neutral. Independent reviews like Lanfax Laboratories provide detailed information on laundry products. Basic guidelines are also available from system suppliers like this guideline from Waterwise Systemsin Australia. It is essential that greywater is diverted to sewer when garden-unfriendly products are being used.