Hot Water Systems for Perth Homes & Businesses

Hot water systems are a necessary appliance for all domestic and commercial premises within the Perth region. There is a wide selection of water systems to choose from and this can make it a difficult task when choosing the right system for you. The Perth Plumber have over 30 years’ experience in advising and installing the perfect system to suit your home or business. We consider the important factors when picking the correct unit.

Key Factors:
- How many people live in the home
- How many bathrooms in the home
- Lifestyle
- Age groups
- Space considerations for indoor and outdoor
- Service access
- Power source
- Unit efficiency and installation costs

There are many different types of systems that can be installed:
- Electric storage
- Electric Instantaneous
- Gas storage
- Gas Instantaneous

Electric Storage units are common in small homes and office locations with restrictions. Where gas is not available or too costly to install or the property has solar electric panels generating power an electric unit is the most effective system to install. The advantage of an electric unit is no clearance is needed so the unit can be placed almost anywhere. Bigger Electric units are available to cater for commercial properties and larger houses.

Electric Instantaneous units are much smaller systems and are normally found in small houses and offices where there is less of a demand for hot water. The advantage of this unit is it does not require a cold relief valve which makes it a lot cheaper to install when building new properties.

Gas Storage units are quite popular in Perth and are cheaper to install than the instantaneous systems. These units come in a range of capacity sizes and efficiency star ratings – 4 to 6 stars. How efficient a unit is depends on its energy consumption and its rate of recovery. We advise you of the differences and help you to choice a system that suits your budget and lifestyle.

Gas Instantaneous units are the most popular system installed in the Perth region. The installation of these units require a larger gas supply and hot and cold water pipe which requires more work and so the cost to install in higher than other units. However, this system is more efficient to run as the water is heated instantaneously and so the gas is used only when needed. Another advantage of this unit is less clearance is need and the unit is more compact. Some Instantaneous units require an external power point and so an electrician maybe necessary for the install of this system.

Hot Water Safety

Tempering Valves are safety valves which prevent scalding, they do not let hot water exceed 50 degrees. They are required by law and it is our job as licenced plumbers to ensure the safety of your family from the danger of excessively hot water at the shower, basin and bath water outlets. The sanitary fixtures which do not require a tempering valve are the kitchen sink and laundry as water at a temperature higher than 50 degrees is sometimes required at assist in cleaning and hygiene practices. This is why when we are designing the hot water pipe work from the unit, 2 separate pipe runs may be necessary.

Thermostatic Mixing Valves are safety valves which prevent scalding but are used in facilities such as early learning centres, primary/secondary school and nursing homes where the water temperature is limited to 45 degrees by law. This valve simply mixes the hot and cold water from the unit giving no more than 45 degrees at all water outlets.


At The Perth Plumber once your unit has been installed we will contact you with regard to an annual service. It is a manufacturer’s specification to have your hot water unit serviced annually to validate your warranty. Hot water systems will not run efficiently if you do not service them, failure to service your system will cause potential break downs or in worse case complete replacement. Storage systems require the sacrificial anode to be replaced every 2-3 years. The sacrificial anode helps to prevent your copper cylinder from corrosion. Think of your hot water system like your car, if you don’t look after it, it will eventually break down. Prevention is better than cure that is why at The Perth Plumber we advise that you book in for your annual service to help extend the lifespan of your unit and so you will never be left without hot water.

Systems we supply and install:
- Rheem
- Dux
- Bosch
- Rinnia
- Vulcan
- Thermman
- Wilson Super X
- Everhot
- Stiebel Eltron

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