Ideal Solar Fluid 20 Litre 174871

This is a 20 litre container of solar fluid supplied by Ideal for use in their solar thermal systems. It is the heat transfer medium that circulates through the collector loop, carrying heat from the panels on the roof down to the cylinder or thermal store. The fluid is formulated to protect the circuit against freezing and to keep the internal surfaces of the collector, pipework and pump group free from scale and corrosion.

• The fluid in the sight glass or expansion vessel has turned dark, cloudy or black, indicating breakdown of the inhibitor.
• Frost protection has been lost, leaving the collector loop vulnerable during cold spells.
• Solar gain has dropped noticeably, with the cylinder or store taking longer to reach temperature than it used to.
• Sludge, sediment or a metallic sheen is visible when the loop is drained.
• The system has been drained down for repair work and requires a fresh charge.

• Check the appliance model and serial number against the compatibility list below to confirm this fluid is correct for your system.
• Note the alternative part number 1780632, which may appear on older documentation or stock records.
• Work out the total system volume before ordering, as larger multi-collector installations may need more than one container.
• Confirm whether any seals, washers or gaskets disturbed during the drain down also need replacing.