There are drawbacks of traditional rainwater harvesting systems. Some of them require regular maintenance after three years of commissioning, alteration is challenging, accumulation of poisonous gas, difficult to relocate, and more. To overcome these issues, a modular rainwater harvesting system comes into existence. It makes rainwater harvesting more comfortable and effective. In this system, the polymer is used to provide durability and efficiency. It has a high void ratio and saves time. Due to the slide layer design, it does not require any fixing and enhances the installation speed. It offers excellent chemical and water resistance and does not pollute the environment. So, make sure to install a modular rainwater system to get maximum benefits of water conservation.