Funny Brilliant DIY. If you don’t want to modify your existing drain pipes, if you don’t want to spend much money, if you want an easy design, then you need to watch this video.
I provide two easy implementation choices, feel free to adapt to your home configurations. The end result is a removable gray water system: you plug it in during drought months and remove it in a rainy season.
NOTE: Do check your local regulations on use of gray water and installation of gray water systems in order to be sure you are complying with local building codes.