What is the first step in the construction sequence for rainwater harvesting?

The first step in the construction sequence for rainwater harvesting is to choose the tank location. This step is crucial because the effectiveness and efficiency of a rainwater harvesting system largely depend on the correct placement of the storage tank. The chosen location must be accessible for maintenance, ideally situated to maximize collection from downspouts, and should allow for easy connection to the roof drainage system.

Selecting an appropriate tank location takes into account factors such as soil type, proximity to structures, local regulations, and potential space for expansion or additional features in the future. Proper placement also impacts how gravity can assist with the flow of water, helping ensure that the system functions optimally and that the harvested rainwater can easily be directed to the tank.

The subsequent steps, such as routing downspouts to pre-screening devices, installing pumps and piping, and stabilizing the overflow path, are all critical to the overall functionality of the system but logically follow after the initial consideration of where the tank will be positioned. Without determining the tank's location first, these other installation steps cannot be effectively planned or executed.