Hot Water Systems

Perth Master Plumbers Since 2007

No Hot Water? Need a Hot Water System?

Zambezi Plumbing undertake work on all models of Hot Water systems including:-Rheem, Rinnai, Dux, Solar Hart, Edwards, Bosch. Whether you need a service, a repair or a replacement we are here to help, our vans are equipped with a comprehensive range of spare parts so we can get you going with hot water as soon as possible. If you need a replacement………..


The first thing you need to consider is whether you want the heat for your hot water system to be generated by gas, electric, heat pump or solar.

  • Electric
    • Electrically heated storage tank systems are usually relatively cheap to buy and install, but the most expensive to run.
    • Systems that run on off-peak electricity are much cheaper to run. They need a larger tank as the water heated overnight has to last you all day.
    • A four-person household typically needs a 125–160L tank for a continuous system or 250–315L for off-peak.
    • They bot water system can be installed indoors or outdoors.
  • Gas

    • Natural gas is a good option if you have the connection for it. It’s cheaper than electricity and  the hot water systems heat water on demand.
    • A four-person household needs a tank of about 135–170L and here is also have the option of an instantaneous system.
    • These hot water systems are usually installed outdoors due to venting requirements.
    • They have an energy efficiency star rating.
    • Some systems have a pilot light, which uses a small amount of gas. Electric ignition are more economical, but in a blackout you can lose your hot water supply.
    • If you do not have mains natural gas, Liquid petroleum gas (LPG) bottles are an alternative. But expect to pay significantly more in running costs.
  • Solar
    • Consists of solar collector panels and a storage tank. A four-person household typically needs about four square metres of solar collector area (two panels) and a 300–360L tank. You need a large tank to allow for days with less sunlight (or more hot showers than usual).
    • The storage tank usually has an electric or gas booster element to keep the water hot on days with less sunshine.
    • Comparatively expensive and time-consuming to install, but will probably pay for itself in the long run due to very low running costs.
  • Heat pump
    • A much more efficient form of an electric storage tank system that works on the same principle as a fridge or air conditioner, by extracting heat from the air and using it to heat the water tank.
    • Systems are usually integrated (tank and compressor together) but can also be split (separate tank and compressor).
    • They need to be installed in a well-ventilated area preferably outdoors.
    • The compressor on the unit can be noisy, like the outdoor unit of an air conditioner. Therefore you can’t install them too close to a neighbouring home.
    • They tend to work best in warm and temperate regions, most systems have a booster element for days of cold weather or high demand.
    • You’ll typically need a 270–315L tank for a four-person household.The next decision after the heating method, is whether you go for a system with a tank, or one that heats water as needed?
  • Storage tank
    • Most electric, gas, solar and heat pump hot water systems use a tank.
    • Mild-steel tanks can corrode over time; maintenance every few years can help prevent this. They usually have five- to 10-year warranties.
    • Stainless steel tanks are more expensive, but generally last longer and don’t require as much maintenance as mild-steel tanks. They usually carry a 10-year warranty, but still require occasional maintenance (such as replacement of valves and seals).
    • Tanks are insulated, but there is always some heat loss over time, so it’s good to install them in a sunny spot or in an insulated space.
  • Continuous flow
    • Also often referred to as “instantaneous”, a continuous flow HWS heats only as much water as you need, when you need it. It can take a few seconds before hot water starts flowing from the tap, especially when there’s a fair distance of pipe between the HWS and the tap.
    • Most models use gas, but electric models are available.
    • As there are no heat losses as with water stored in a tank, they’re often cheaper to run than storage systems.
    • The size you need depends more on the number of hot water outlets the heater has to serve than on the number of people in the household. We can help to find the right capacity for your home.

Our qualified technicians may suggest replacing the hot water system rather than replacing parts. This would be because it is not cost effective to replace a part or if the hot water system is old and corroded. They will be able to advise you on the most suitable hot water unit dependant on your individual circumstances they are as conscious as you are about saving you money.

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We are more than happy to give advice on which solution is most suitable for your needs, depending on your Plumbing requirements. Why not ask us to view your property and discuss the various options with you now!

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