Solar Advantage

New Solar Hot Water Geyser Installation

A new geyser installation allows the solar hot water geyser to be fitted directly to your water system, suitable for low or high-pressure water conditions, this eliminates the need for a normal electric geyser.

Installation Requirements:

  • A Basic Installation Kit.
  • A steel frame if the solar hot water geyser is mounted on a flat roof.
  • Tile roof hooks if the solar geyser is mounted on a tile roof.
  • IBR or corrugated roof hooks if the solar unit is mounted on an IBR or corrugated roof.

Solar Hot Water Geyser – New Installation

For a new installation (above diagram) where the solar hot water geyser will replace the need for a normal electric geyser and be a stand alone unit, the following type of installation should be followed.

This type of installation is NOT used when the solar hot water geyser is being used to PRE-FEED an existing electric geyser.

The basic installation kit which may be ordered with the solar geyser comprises of the following:

  • A Temperature & Pressure Relief Valve.
  • 300 Kpa Non-Return Pressure Reducing Valve.
  • Vacuum Breaker.


  • Copper piping and connections.
  • Tempering Valve (Mixing Valve).
  • Element for heating water on sunless days or during the evening.

With this type of installation, the cold water supply passes through the non-return pressure reducing valve (PRV) into the solar hot water geyser at the bottom of the unit, before entering the solar geyser it “T’s” off to the Tempering Valve, thus providing the cold water to reduce the temperature of the hot water coming from the solar geyser before being supplied to the establishment.

The solar hot water geyser must be installed in a north, north-west facing position, please read our article on solar geyser placement for more details.

At the top of the solar hot water geyser, the hot water outlet also connects to the tempering valve. The tempering valve mixes the hot and cold water together, regulating the outlet water temperature to a maximum of 50º Celsius.


Vacuum breakers prevent water from being siphoned backward into the water system and protect water geysers against vacuum conditions. A vacuum breaker typically contains a plastic disc that is pressed forward by water supply pressure and covers small vent holes. Should the supply pressure drop, the plastic disc springs back opening the vent holes, letting the outside air into the system thus preventing the backflow of water or a vacuum forming.


The T.P. relief valve (temperature and pressure relief valve) is a safety valve that is set at 80º Celsius (Temperature) and 200 Kpa (Pressure), the valve will release water from the geyser if the pressure rises above 200kpa or the temperature rises above 80º Celsius.


If you would like to order a solar geyser or solar geyser installation or if you have a question about solar hot water systems or our company, contact us on the numbers below or Click Here to use our contact page as we’d love to hear from you and look forward to assisting and welcoming you as one of our valued clients!


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