Gray water is the water used from bathroom and kitchen sinks, bathtubs, washing machines and dishwashers. Any water in direct contact with human waste, such as toilet water, is excluded from it. Gray water accounts for 70-60% of the total water consumed, while it may appear impure for irrigation with some dirt such as: hair, food, dust and detergents, but it is safe and even beneficial for gardens and plants. In addition to saving water and reducing your bill, reusing gray water keeps it away from sewage, thereby reducing its pollution of local water for disposal. The system needs to be connected to gray water sources such as washing machines and sinks. The graywater system is installed by a plumber, and requires no plumbing modification or underground system installation. The simplest way to make use of gray water is to drain it directly outside, then the water will be filtered through the graywater system and then diverted to irrigation for plants and trees.
Gray water is different from clean water and needs several conditions to be taken into consideration:
Gray water should not be stored for more than 24 hours. If you store it, the nutrients will degrade and cause bad odors.
Reduce contact with gray water. Since gray water may be contaminated it is a must. The system allows the ground to absorb water.
Keep your system simple, avoid pumps, and avoid filters that need constant maintenance, Use a 3-head valve (to facilitate switching between the graywater system and the sewage).
Weigh the amount of water your plants need to drain the excess.