Hot Water Systems


We Install, Repair And Service Your Hot Water Systems


For professional recommendations, installations, repairs or maintenance regarding hot water systems in the Northern Territory, consult with Water & Waste Plumbing Darwin. We work with small and large hot water systems in both homes and commercial properties.

Water & Waste Plumbing can help you decide which hot water systems are the right fit for your household needs.
For installations and repairs, we source from top brands around Australia and internationally to get you the right products at affordable prices.

There are five main categories of hot water systems, all of which serviced and installed by our friendly qualified team.

These include:

  1. Solar hot water systems.

  2. Electric hot water systems.

  3. Gas hot water systems.

  4. Heat pump hot water systems.

  5. Continuous flow hot water systems.


Types Of Hot Water Systems


Solar Hot Water Systems

A solar hot water system works by collecting rays from the sun using a set of solar panels and converts it into heat energy. That heat is transferred to the water in a water storage tank connected to your main water supply. The tank remains full and continues to circulate the water through the panels heat exchangers as the solar panels continue to absorb energy from the sun costing you nothing. Solar hot water systems are the most energy efficient and environmentally friendly hot water system around, using renewable energy to quickly heat your home’s water. It’s the perfect option for anyone interested in lowering their carbon emissions and yearly energy bill expenses.

There are many different sizes and designs for solar hot water systems. Panels and tanks are available that can service large households or constant commercial use without running short on hot water. We also have smaller systems that are useful when you need less water.

Solar panels are often installed on the roof of the building on your property, but the water tank can be installed on the roof, the ground or elsewhere. If you have any questions about our quality solar hot water heaters, contact us today.

Most hot water systems come with a booster. Boosters act as a backup to your hot water system when there’s not enough sunlight to absorb. Boosters can be powered by gas or electricity. The boosters will kick in when you need hot water, either by manually turning a switch or automatic detection system.


Electric Hot Water Systems

Electric hot water systems are common in many homes and businesses. They connect directly to the electrical system of the building and the main water source.

A heating element inside the water tank continuously heats water inside the tank until it reaches its set temperature and maintains that temperature. As you use water, it refills again and continues heating.

These are often the most convenient types of systems, as both water and power are already available on most properties. Initial installation cost is cheaper than a solar system because only the tank unit itself is required. Heaters of any size can be sourced and installed to accommodate the needs of the home or business, although they are not to kind on the electricity bills.

If you wish to have an electric water heater installed at your property, book an appointment today.


Heatpump Hot Water Systems

Heat pumps extract heat from the surrounding environment and use it to warm water in a tank. By utilizing the ambient air temperature, they are able to achieve a high level of energy efficiency.

Heat pumps work a bit like a refrigerator in reverse. A fan draws air through an evaporator. Thermal energy within the air is transferred to a liquid refrigerant causing it to change into a gas. The refrigerant gas is then drawn into a compressor which increases the pressure and temperature. A heat exchanger then transports the hot gas refrigerant around the outside of the water tank. This heats the water inside the tank. The gaseous refrigerant reverts back into a liquid and then the process starts again.

Most heat pumps also come with a back up booster element. This button can be pushed in times of high demand heating the water in the tank. This is helpful during particularly cold periods. 


Gas Hot Water Systems

Gas Hot Water Systems

Gas hot water is a cost effective, energy efficient option for all households. When compared to electricity you could save almost one third of expenses on energy bills – depending on your individual circumstances.

There are two main types of gas hot water systems – instantaneous and storage tank. They can run on mains natural gas, or more rarely, bottled LPG.

An instantaneous hot water system is a wall mounted unit. Water is heated as it moves through internal pipes, and only as you use it. It’s a cost effective supply of hot water, perfect for smaller households. When compared to an electric storage tank the savings are instantly noticeable.

A gas storage tank heater takes up more space but does provide a larger supply for bigger households. Once again it is an energy efficient alternative to its electric counterpart, and worth considering if you have access to natural gas.


Brand We Use And Recommend

For your convenience, we work with a range of brands, styles and models of hot water units. When it comes to installation, we can supply our own from recognized and reputable companies.


Benefits Of Servicing A Hot Water System

No matter the type of hot water system you have, we can see to all of its needs. But you may be wondering why you actually need a service?

You should have a hot water system serviced regularly to prolong its life. You’ll most likely encounter some plumbing and electrical issues during its life, and there are some clear signs you need to call in a qualified plumber.

These can include:

  • No Hot Water At All

  • Leaking Water From Tank Or Pipes

  • Discoloured Water

  • Running Out Of Hot Water Quickly

  • Banging, Whistling Or Vibrating Noises

  • Pilot Light Going Out

Working with everything from continuous flow, electric storage tanks, solar hot water systems and even heat pumps, Water And Waste Plumbing has knowledge of all hot water systems. Our expert technicians will always give you a long term solution and maximum benefit.


Tempering Valves & Thermostatic Mixing Valves

What are Tempering Valves And Thermostatic Mixing Valves?

The main purpose of a tempering valve or thermostatic mixing valve is to ensure scalding does not occur if a child, adult or person with a disability was to come into direct contact with water exceeding 50 degrees and burn themselves at a tap.
Most storage tanks come with a heat up to a temperature where third degree burns are possible which means we then need to install a tempering valve which carefully mixes cold and hot water together to achieve a temperature low enough to not cause third degree burns while still supplying hot water.


Tempering Valves Are Law For All Hot Water Systems In The Northern Territory


Hot Water System Replacements

Replacing a hot water system – regardless of the type of hot water system or location.

Approximate Chart In Which Third Degree Burns Are Possible



Seconds For An Adult To Get Burnt


Seconds For A Child To Get Burnt



Seconds For An Adult To Get Burnt


Seconds For A Child To Get Burnt



Seconds For An Adult To Get Burnt


Seconds For A Child To Get Burnt


Frequently Asked Questions

How Long Do Hot Water Systems Last?

The average lifespan depends a little on the type of hot water system you have. A continuous flow gas-powered hot water system can last 15 to 20 years with proper care. An electric hot water system has a lifespan of 8 to 12 years depending on whether it is a tank system or tankless. Your hot water system warranty is a good sign of how long it will last.

Does My Hot Water System Need To Be Serviced?

Yes! Most hot water systems require a minimum service every 6 months such as pulling the relief valve lever to ensure it works properly. Solar hot water systems may need the panels cleaned to run most efficiently. Every 1 year most hot water systems will require you to have the relief valve replaced, this is very important as it will prolong the life of your hot water system greatly. A major service is usually required every 5 years. Adhering to these rules will keep from voiding your warranty. Referring to the owners manual will provide the manufactures recommendations for your individual hot water system.

What Is The Most Efficient Hot Water System?

Heat pump water heaters are highly efficient and use 30% of the energy of a conventional electric hot water system. These systems use a refrigeration cycle to extract heat from the air to heat the water. There are 2 main types: Integrated with the tank and compressor combined.