Six Hard Checks
- 3C certification — mandatory for electric water heaters.
- RCD leakage plug — 30mA, trips within 0.1s.
- Dry-burn and overpressure protection — dual thermostat plus relief valve.
- Enameled tank — more pressure- and scale-resistant than plain stainless.
- Water-electric isolation — preferably with power-off-on-outflow.
- Warranty — 3y unit / 5y tank minimum; 8y tank is excellent.
After Delivery
- Match nameplate wattage to your socket (10A vs 16A).
- Check accessories: relief valve, gaskets, manual and warranty card.
- Fill and bleed the tank fully before first power-on.
Bottom Line
Safety features are the floor, tank craft decides lifespan, and warranty decides long-term cost.