Interactive Selection Tools
First Flush Calculator
Interactive Tools and Services
![Mass Balance Tool](https://rainharvesting.com.au/wp-content/uploads/2024/03/Mass-Balance-Tool.png)
Mass Balance Tool
Calculate your monthly and annual tank levels based on your usage, collection area and rainfall patterns.
![Filter Housing and Cartridge Selector](https://rainharvesting.com.au/wp-content/uploads/2022/07/tools-categorytn-filters.png)
Filter Housing and Cartridge Selector
Select the right filter system or replacement cartridge for your property.
![Tank Screen Tool](https://rainharvesting.com.au/wp-content/uploads/2022/10/tools-categorytn-tank-screen.png)
Tank Screen Tool
The perfect tool to help you select the right tank screen every time.
![Rain Head Selector](https://rainharvesting.com.au/wp-content/uploads/2023/05/rhs-tenant-bmco.png)
Rain Head Selector
Select the right rain head for your property.