AquaMax G390SS

The Aquamax G390SS is probably the No. 1 choice in gas storage hot water today for large families.  It's an ideal replacement for most 135 to 170 litre gas hot water systems on the market.

It is locally made right here in Victoria by Rheem.  It has a 155L stainless steel cylinder and has a high efficient burner and flue/heat exchange system that allows water to be heated much quicker than a conventional gas storage hot water.

It also has an ingenious manual delivery water mix valve on the water inlet/outlet assembly.  Normally set by us during installation, the valve is adjusted so hot water mixes with cold water to manually provide a set delivery temperature.  As an example, the water temperature inside the storage cyclinder may be 75°C, however after setting the mix valve, the hot water delivery temperature may actually be 55°C. 

NOTE:  This is not to be confused with a Tempering Valve, that is an added valve by the plumber that reduces outlet water temperature to a safe level and works on temperature.  It is a safety device and is required by regulations in some newer homes.  

155 Litre tank but it's called a 390 you ask?  This model Aquamax utilises the mix valve and a bit of common sense of giving the unit rest breaks between showers, in a one hour period depending on settings and use,the system has potential to provide 390 litres of hot water.

This unit has a 12 year warranty on the stainless steel storage cylinder.  Call us to ask about a new changeover installation of an Aquamax G390SS in your house.   

Installations We Have Completed

We replaced a very old Dux hot water system here.  Our customer researched and planned the installation and an Aquamax G390SS was chosen.

We raised this and put the new system on a new larger concrete slab.  The old one had sunken into the ground.


This was an urgent changeover job, a leaking 135 litre system was replaced on the same day our customer called up.

An Aquamax G390SS was chosen for this job as customer wanted to allow for a growing family.

Our customer replaced a leaking 135 litre system here.  Of course an Aquamax G390SS was chosen.  He wanted something that was going to last a long time.  

The old steel tank was recycled.

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