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System Fluid
System Fluid

System Fluid

Often the effectiveness and efficiency of a solar thermal system are determined by the quality of the system fluid used. At BES, we understand the importance of having the right solar thermal system fluid, which is why we offer high-quality system fluids that meet the highest industry standards. 

Whether you need thermal fluid, solar cleaner, solar fluid or demineralised water, get a good deal on solar thermal system fluid when shopping at BES. With great prices, fast shipping and free returns, shopping with us couldn’t be easier. 

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A great range of solar thermal system fluid 

A solar thermal system fluid transfers heat from the collector to the storage tank, prevents corrosion and scale formation and helps the heating system resist freezing while maintaining stable thermal properties over a wide range of temperatures. Our range of solar thermal fluids is formulated to meet these requirements. 

The BES range of solar thermal system fluid includes:  

Thermal Fluid For Solar Systems 

Our solar heat transfer fluids are designed for use with hot plate and vacuum tube solar heating systems. The most popular thermal fluids in the range are the Sentinel R100 Solar Thermal Fluid, a stable, non-toxic glycol fluid and the Cura Solar Heat Transfer Fluid, a ready to use fluid that offers frost protection to -28°C. 

Solar Cleaners For Solar Systems 

Ideal for removing blockages, sludges, deposits and degraded solar fluid, the cleaners in this range are non-foaming, non-toxic and can be used without dilution. It is recommended to flush the solar system with demineralised water after cleaning. 

Demineralised Water For Solar Systems 

Designed for rinsing a solar heating system after cleaning, our demineralised water options are pure water liquids, free of dissolved minerals, salts or ions. Our most popular Demineralised Water is from Cura and is available in a 5-litre option.  

Solar Protectors 

Solar protectors are chemicals formulated for use as heat transfer fluids within solar thermal heating systems at elevated temperatures, in excess of 180°C. The most popular solar protector in the range is the Fernox Solar Protector, a solar fluid compatible with all makes and models of solar panels. 

Recovery Containers 

When solar safety valves actuate, the solar glycol fluid that gets expelled must be stored in a secure container. Our most popular recovery container is the Safe Valve Solar Fluid Recovery Container, which includes a drain valve.  

All the solar thermal heating systems products you need 

Here at BES, we’ve made shopping for renewable solar thermal products a breeze. Our solar thermal system parts range includes circulator pumps, pipe insulation, valves, controls, pipe & fittings, pump stations, fill & test, expansion vessels, consumables, air vent and cylinders. 

You can also view our entire range of renewable heating & ventilation products here. 

Why choose BES 

As a trusted partner to those in the trade for over 45 years, at BES, we don’t just help get the parts needed for solar thermal heating systems, but we ensure we get them for as low a price as possible.  

With an Excellent rating from Reviews.co.uk and with over 15,000 products in stock, you’re guaranteed to get what you need when you need whenever you shop at BES.   

System fluid for your solar thermal heating system delivered quickly 

With next-day delivery available on thousands of products, we aim to deliver your system fluid as quickly as possible. 

Our products are backed by our team of experts, who are always on hand to provide technical support and advice. If there is a specific system fluid or item you’re not finding, please contact us, and we’ll be happy to help you source it or find something appropriate. 

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