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Paarl, July 2003: The first solar-adaptable, non-corrosive, and non-metallic Xstream geyser is produced — a geyser which is still operational today, just like 99% of all Xstream geysers manufactured since.

An analysis of the geyser market and specifically, finding the reasons why traditional geysers fail, was the motivation behind the establishment of Xstream by Dawie Thirion in July 2003.

The company obtained the SABS mark of approval in August 2003, while they have also implemented and subscribe to the ISO 9001:2008 quality management system.


It is common knowledge that corrosion, metal fatigue, lining problems and some or other form of galvanic reactions associated with various types of metal, traditionally used in the construction of inner tanks for geysers, are the main causes of the premature failing of hot water tanks. Together with the University of Cape Town, design engineer Willie Meissner was commissioned to build a finite element model to simulate the environment wherein geysers operate, and to eliminate the bulk of the causes of failure.

The solution came through identifying non-ferrous materials that could withstand the demanding conditions under which high-pressure tanks operate, being that the inner tank must perform under pressure, at high temperatures, and survive an extremely aggressive chemical-corrosive environment, while the outer must have an aesthetically pleasing look and feel, be noncorrosive, and possess low heat-loss qualities.

“The insights that the finite element model produced in design and material selection have been invaluable and it has proven to be one of the cornerstones of Xstream’s successes,” says Thirion.


All Xstream tanks are solar tanks with electrical backup; hence flat panels, evacuated tubes or a heat pump can be connected during installation, or anytime thereafter, by simply blocking off the ports on the tank. Retrofitting of any panel, tube, or heat pump can therefore easily be done at the cost of the panel and labour only — from as little as R5 000.

• 400kPa direct solar tanks with electrical backup ranging from 50 to 200 litres, with interconnection options catering for 300–400 litres. Any form of solar absorption media, be it flat panels or evacuated tubes, can be connected, or the solar ports on the tank can simply be blocked off for future connection.

• 400kPa indirect solar tanks ranging from 100 to 200 litres.

• Open to vent, cistern-type (low-pressure) tanks with evacuated tubes. These models are available with or without electrical backup elements positioned in the upper half of the tank.

• Open to vent (atmospheric) insulated tanks in 650 and 2 000-litre capacity.


The Xstream range of geysers carry a seven-year warranty, with an option of a 10-year warranty if installed by an Xstream accredited installer (subject to certain terms and conditions).


“The greenest car ever built is not as green as the car never built.” (Author unknown)

This is Xstream’s belief as well — they build geysers to last.

Over the past 15 years, Xstream has carved out its niche in the hot water cylinder market, proving the remarkable durability of its geysers in extreme environmental and water conditions; be it borehole water on farms (nationally), the harsh conditions of St Helena island, coastal areas, the Northern Cape, or Namibia. A steady increase in demand, particularly on islands off the coast of Africa, has also created growth as these markets identify and acknowledge the durability of the company’s products.


Xstream believes that the future for their products looks bright and they are committed to maintain the same manufacturing standards on which the company’s success has been built, as well as sourcing only local products from reputable companies, ensuring availability of parts at all times.

Opportunities also await with prototype testing of the company’s 300-litre vertical tank, which is well on its way; the soon-to-be-launched new-look Category B-rated tank; and trap doors specifically designed for easy installation of the increased size of the new Category B geyser.



B-Tec Distributors

B-Tec Distributors has been supplying several types of geysers for seven years and has found that the Xstream geyser is unparalleled in reliance and corrosion resistance. The slight weight is also a bonus when installing in high places. Furthermore, lots of money can be saved by utilising the solar option.


On Tap Paarl

On Tap Paarl has been doing business with Xstream since 2003. Xstream geysers are made to last. With all the Xstream geysers we have sold, we have not had one tank failure, only the odd thermostat and element failure. The Xstream geyser is the perfect solar geyser, designed for all weather and water-type conditions. We have poor water conditions in our farm areas and the Xstream geyser is the only geyser that lasts. We can sell the Xstream geyser with confidence and know that our clients will get excellent service from the product. This geyser also has superior benefits above other geysers on the market. I will always recommend an Xstream geyser to a client.



Aquasolar has been using Xstream solar geysers in our installations for the past six years. Their service is always exemplary and both pre- and post-sales support is great. The Xstream geyser is a very reliable product with an almost non-existent failure rate, and plenty of stock always on hand. In this fickle industry, it is hugely beneficial to have a partner like Xstream that we know we can rely on. I would definitely recommend doing business with Xstream based on our long-running positive experience in dealing with the company and their product.


ITS Heat Pumps and Solar

Over the past 12 years, ITS has partnered with Xstream for a number of reasons with regard to the procurement of domestic geysers. The brand has become synonymous with strength, longevity, and high performance, something rarely seen in the current geyser market in South Africa. With their fast, efficient service, you are always guaranteed the greatest quality systems at an affordable price, backed by their unrivalled support structures. We will continue to use Xstream for many years to come and would like to say that if you want a geyser that will last, Xstream is the way forward!


Queen Mary Store, St Helena Island

Saving electricity with solar water heating sets only makes sense if your equipment lasts well beyond the breakeven point of your investment. That is why we chose Mainstream tanks by Xstream. We have been selling Mainstream tanks since 2005 and we have not had a single report of any failure or need for replacement from any customer. That is total reliability you can count on! You will save many times the cost of your investment during the first 10 years and you will wonder why you didn’t do it earlier!

Company Profile

Xstream Solar Hot Water Cylinders (Pty) Ltd, the manufacturer of the internationally patented XSTREAM range of electric and solar hot water cylinders is located in Paarl, Western Cape, South Africa. 

We manufacture state-of-the-art corrosion free solar hot water storage tanks for a wide range of applications joining in the global effort to reduce the human carbon footprint and really save energy, resources and money.

Manufacturing standards are maintained through the application of the ISO 9001:2015 Quality Management Systems. 

The XSTREAM range of electric and solar boilers excel in a number of ways with features, not normally found in other geysers or storage tanks:

•     The tank is totally corrosion and electrolysis free - therefore NO SACRIFICIAL ANODE IS REQUIRED

•     The XSTREAM range of products are standard solar adaptable, which means that a solar panel can be connected at any future time

•     The combination of materials used in production (Epoxy Vinyl Ester and Glass) ensures minimal heat loss, and is nine times stronger than metal on a weight to weight basis

•     It can be installed interior or exterior

•    Excellent Concept! Quality Product!

Our objectives

- Servicing our clients in a professional and cordial manner
- Ensuring client satisfaction through the supply of a trouble free, long lasting product
- Continually improving our products
- Rendering an effective & efficient after sales service
- Continue manufacturing in accordance with ISO 9001 standards, and to SABS specifications
- Providing fully trained, participating & committed staff to fulfill our objectives
- Seeking international co-operation / distribution of our product range.


“At the winery we use cross flow membrane filters to filter wine after fermentation to remove fine particles e.g. yeast, etc. The membranes have to be washed once a day with hot water (80o C). For this process we need 1200 litre of hot water. Our original installation used metal geysers from a reputable source, but these units did not last very long with the corrosive water in the area. We decided to look for non-metal units with “hard water” elements and decided to try the Xstream units. Xstream installed six 200 litre units in series on a steel frame. To our surprise the units lasted extremely well. Even the elements that we replaced 4 monthly in the past, lasted for three years before the first one had to be replaced. With these results we decided to use the geysers for other installations where similar filters are in use. The geysers at Nederburg were installed mid 2010 – 5 years ago. At Nederburg we installed 6 x 200 litre units. At our Stellenbosch plant we are at present installing another 8. Our biggest surprise was how long a geyser could last without giving problems. After five years the units are still in excellent condition and their appearance still very good. It is a good looking product (located in a visitor’s area), long lasting and virtually maintenance free. We bought the geysers because they were corrosion resistant. We are not using solar heaters yet, but the units are very well insulated and using them in series helps to save energy as only the bottom one switches on if a small amount of hot water is used. The product gives good service with minimal maintenance. Back up service was very good the few times we needed it for replacement elements. ”

“Saving electricity with water heating solar sets only makes sense if your equipment lasts well beyond the break-even point of your investment, that’s why we chose Mainstream tanks by Xstream. We have been selling Mainstream tanks since 2005 and to date we have not had a single report of any failure or need for replacement from any customer, that’s total reliability you can count on!

Comparison between non-ferrous (Xstream) tanks and corrosion prone metal tanks. 

Some comments on our 7 Year Warranty announcement: 

"Based on this historical performance of our tanks we hereby increase our five year warranty to SEVEN years."

“Great achievement guys and congratulations on a wonderful product!

I have no doubt that you will continue to achieve even greater results in the coming years.”

“Dit is 'n fantastiese mylpaal!! Baie geluk.

Baie dankie ook vir die goeie nuus dat die waarborg nou 7 jaar is op

al jul geisers.”

“Indeed good results, great, makes supporting the local manufacturers a no brainer.

Kind Regards I Vriendelike Groete”

“Baie geluk, dus voorwaar n prestasie. Well done. Doen so voort.


“Wow what a record !!!!!!!!!!

Congratulations to the whole Xstream team.”

“Brilliant. You have a right to be proud -that is a fantastic achievement!!

Well done.”

Some of our clients include: