The garden complex is a type of underground rainwater management system. The garden complex provides a comfort design. To have an easy access to the water, the garden chest is made of system connectors. The system can be used as a source of water for automatic watering system. The garden complex consists of an environment protection. Plants and soil benefits to this because no chlorine from tap water gets to the soil. Rainwater can be used for household purposes. The tank can be used for a long time. The quality is approved by Technical Approval no. AT-15-7900/2009. The system is mostly used in the garden with an underground tank.