| Parts |
Maintenance | Frequency |
| Roof | Wash off roof with water when dust/dirt accumulates diverting runoff way from tank inlet. | Monthly and especially after a long period of dry weather or heavy wind. |
| Sweep off leaf litter | Regularly, especially after heavy winds and just before the rains set in. Check daily for leaf litter accumulation during rainy season | |
| Trim and cut trees around roof |
When required | |
| Fix damage to roof (broken tiles, cracked water-proofing etc.) | At the earliest and definitely before the rainy season | |
| Paint if rust is present using lead-free paint | At the earliest and definitely before the rainy season | |
| Gutters and Downpipe | Clean and wash out bird droppings, leaves etc., with water | Check monthly and especially after a long period of dry weather or heavy wind. Check daily during rainy season |
| Check and repair gutters and downtake pipes | When required | |
| Ensure guttering / downtake pipes are sloped to ensure steady flow and avoid pooling of water, collection of dirt, debris, etc |
During installation and after periods of heavy rain | |
| Repair leaks at elbows | When required | |
| Filters |
Clean | Before and after rainy season |
| First flush devices | Check and clean |
Before and after the rainy season and after every rooftop cleaning session |
| Tank |
Clean | Before and after rainy season |
| Repair leaks |
At the earliest | |
| Cut nearby tree roots (if underground tank) | At the earliest | |
| Ensure lid is sturdy and secure | At all times | |
| Ensure there are no gaps where insects can enter or exit |
At all times | |
| Securely fasten insect screen over the end of the overflow pipe/valve |
At all times
|
Source: Rainwater Harvesting - Trainers’ Manual published by Karnataka Urban Infrastructure Development and Finance Corporation