Hyderabad's rain arrives mostly in a few monsoon months, much of it running off roofs into drains. A recharge pit sends it back into the ground under your plot instead.
Two Approaches
| Approach | How | Use |
|---|---|---|
| Recharge | Roof water → filter → recharge pit or borewell recharge | Groundwater, borewell yield |
| Storage | Roof water → filter → tank or sump | Non-drinking use; overflow to recharge |
Building a Recharge Pit
- Position away from footings and the septic tank, near the downpipes.
- Dig to the size specified for your roof area.
- Layer boulders at the bottom, then gravel, then coarse sand on top, with a mesh between layers.
- Filter roof water first to remove leaves and debris.
- Cover the pit with a perforated slab or grating for safety.
- Maintain — clean the top sand layer before each monsoon.
Planning It With the House
- Roof slopes and outlets direct water to the downpipes.
- Downpipes route to the filter and pit, not to the septic tank.
- The pit position is shown on the plan with other underground structures.
The Short Version
Filter roof water into a layered recharge pit (or storage with overflow), keep it away from footings and the septic tank, and clean it before each monsoon. It is often required, and it keeps your borewell alive.
