Aquamax G390SS-NG 155 Litre SS Gas Storage


(Manufactured by Rheem)
12 year cylinder warranty
1 Year cylinder labour
1 year parts and labour warranty on all other components for domestic (non-commercial) installations.


Free Delivery To most metro areas of Australia

Not available in Western Australia



Brochure Owners Manual


Model No. Aquamax G390SS-NG

Aquamax G390SS Gas hot water storage is extremely cost and energy efficient

Largest delivery in our range, you choose the mix.

The AquaMAX G390SS patented in-built mixing valve gives you up to 390 Litres first hour delivery with a 5 Star Energy Rating and 10 Year cylinder warranty. As an installation option, your plumber can also install twin temperature delivery so you can enjoy the convenience of 65°C hot water in the kitchen and laundry when you need it, while taking comfort in the knowledge that it is safer for kids with bathroom hot water taps at 50°C or lower.

Product Features:

  • Natural Gas
  • 390 Litre First Hour Delivery
  • 155 Litre Stainless Steel tank
  • Inbuilt Mixing Valve
  • 5 Star Energy Rating
  • 10 Year Cylinder Warranty1
  • External Installation

Model No. G390SS-NG  gas water heaters offer you more than just 5 Star
energy efficiency.
With Stainless Steel cylinders across the range they are the
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.


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




G390SS Diagram 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

1 Warranty: 10 years parts on cylinder, 1 year parts and labour on cylinder and all other components, when installed in a domestic
dwelling. For all other installations, warranty period is one year parts and labour on all components. Conditions apply, see the
AquaMax warranty set out in the Owner’s Guide and Installation Instructions or view at
2 Based on cold water temperature of 15ºC
3 Note: AquaMax Stainless Steel Water Heaters are not recommended for installation in some areas. Refer to the AquaMax website
for details of areas not recommended and for which product is not covered by warranty.



Additional information

Type of System

Energy Source

Size by Litres


Gas Input MJ/h

Height (mm)

Width (mm)

Depth (mm)

Weight -kg

Manufacturers Warranty

ECV Setting

TPR Setting

Star Rating

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