System and method for recycling of gray water

Plant for recycling of gray water with 1.1 a an inlet having for the gray water storage tank (1), 1.2 at least one out of an outlet of the collecting container (1) supplied with gray water treatment tank (7) for the biological and, if necessary, mechanical treatment of the waste to be recovered again gray water, 1.3 a with an exit of the treatment tank (7) connected to the service water tank (10), 1.3.1 from which the process water is removed for reuse, and 1.4 with a heat exchanger (20) in the collecting container (1) and 1.5 with a heat exchanger (21) in the service water tank (10).