If you're on an RWA committee scheduling a tank clean for your community, this is the checklist to circulate, covers what needs to happen before the crew arrives, what to tell residents, and what to expect during the visit.
Before the crew arrives
- Tank access. Clear the path to the tank's inspection/cleaning point. If it's behind a locked grille, make sure a keyholder is available.
- Power. One functional 16A socket needs to be within reach of the tank for the crew's equipment.
- Water level. Ideally draw the tank down to 100–500 L (under 5% of capacity) before the visit, anything above that affects the resident's EcoScore™ rating for the service.
- Notify residents. Send a clear notice: "Ozone at Work" during the service window. Residents and pets should stay away from the tank/work zone, ozone remains active until the crew confirms completion, and water shouldn't be drawn for a full hour after the crew leaves, to let the ozone fully self-neutralise.
What to expect during the visit
| Tank size | Typical duration | Crew size |
|---|---|---|
| Small (up to ~10,000 L) | 1–2 hours | 2 technicians |
| Medium (~10,000–50,000 L) | 2–3 hours | Up to 3–4 technicians |
| Large (50,000 L+) | 3+ hours | Up to 5 technicians |
Expect the water supply to be unavailable for 2–6 hours depending on tank size, plan resident usage around this window in advance.
After the visit
- Don't use tank water until the hygiene certificate is issued.
- Sludge/waste is fully handled by the crew on-site, no separate disposal arrangement needed from the RWA.
- Share the QR-verified certificate with residents, it's designed specifically to be forwarded in a resident WhatsApp group or posted on a noticeboard.