Description
Aquamax G390SS-NG
Aquamax G390SS Gas hot water storage is extremely cost and energy efficient
Largest delivery in our range, you choose the mix.
| Cat. No. | G390SS |
|---|---|
| Gas type | Natural |
| Tank Capacity | 155 Litres |
| Nominal gas consumption | 40 MJ/Hr |
| AGA Star Rating Index | 5 Stars |
| Recovery rate at 45°C rise | 185 Litres/Hr2 |
| Installation type | External only |
| Pressure & Temperature Relief Valve setting | 1400 kPa/99°C |
| Max. water supply pressure | 1120 kPa |
| Tank material | stainless steel |
| Warranty (Cylinder) | 12 years |
![]() |
Overall height | 1625 mm |
| Width (approx.) | 520 mm | |
| Depth (approx.) | 610 mm | |
| Weight empty (approx.) | 65 kg | |
| Number of people | 3-6 | |
| Water inlet connection | Rp ¾” (20mm) Female | |
| Water outlet connection | Rp ¾” (20mm) Female | |
| Gas connection | ½” flared compression | |
| WaterMark Licence No. | WMKA00200 | |
| AGA Approval No. | AGA 6114 G |
Warranty & Important Notes
- Warranty (Domestic Installation):
- 10 years on cylinder (parts)
- 1 year parts and labour on cylinder and all components
- Warranty (Non-Domestic Installation):
- 1 year parts and labour on all components
- Conditions:
- Warranty conditions apply
- Refer to the AquaMAX Owner’s Guide and Installation Instructions
- Or visit www.aquamax.com.au
- Performance Basis:
- Based on a cold water temperature of 15°C
- Installation Suitability:
- Stainless steel units are not suitable for all areas
- Check AquaMAX website for excluded locations
- Warranty does not apply in non-recommended areas






















The AquaMAX G390SS features a patented in-built mixing valve, delivering up to 390 litres in the first hour.
It achieves a 5-star energy rating and includes a 10-year cylinder warranty for proven performance.
Additionally, your plumber can install twin temperature delivery. This means you get 65°C water in the kitchen and laundry, while bathroom outlets remain at 50°C or lower for added safety.
Product Features:
The G390SS-NG gas water heater not only delivers 5-star energy efficiency, but also provides powerful, reliable hot water when you need it most. Additionally, stainless steel cylinders across the range make it a preferred choice for homeowners and plumbers alike. Providing hot water recovery of up to 185 litres per hour,
there is an AquaMax model to suit even the largest household.