JoJo Rainwater Harvesting and Filtration Guide: From Roof Catchment to Tank
Guide Type: Buyer guide
Plan a JoJo rainwater-harvesting system from roof catchment to tank, including gutters, leaf management, first-flush approach, filtration, overflow and intended use.
Quick answer
Rainwater harvesting is a chain from roof to final use. A complete plan records catchment, gutters, pre-tank debris handling, tank base, overflow, pump and filtration appropriate to the water’s intended use.
How to compare the options
| Option | Best suited to | Include in the allowance |
|---|---|---|
| Garden or non-potable harvesting | Supplementary water use with a clearly defined system boundary. | Catchment, tank, pump, filtration level, overflow and garden connection. |
| Building-supply planning | A project considering a more integrated water strategy. | Water quality, separation, treatment, controls, approvals and professional design. |
Cost and planning checklist
- Define the intended use before selecting filtration or connecting stored water to any building system.
- Show overflow and stormwater destination on the site plan.
- Use manufacturer guidance for tank base and connection details.
Use the estimator
Build an early, region-aware allowance in the Price Your Build free estimator. It is a feasibility tool, not a supplier quotation, final design or professional certification.
Related Building Glossary guides
Frequently asked questions
Does a larger tank solve every water problem?
No. Catchment, demand, water quality, pump duty, overflow and the system’s intended use still govern the design.
Can I combine rainwater and municipal backup?
Potentially, but the connection, isolation, water quality and local requirements need a proper design.
Important
Confirm the final product, scope, installation method, drawings, approvals and professional requirements for the specific site before committing to work.
Source to check
JoJo DIY installation guidance: www.jojo.co.za/diy-installation-brochures-leaflets/