The Frost Protection Valve is designed to protect
solar collector panels by preventing the water from
freezing when the air temperature drops.

When the air temperature falls below 3ºC, the
thermostatic element opens the valve, thereby
allowing warm water from the solar storage tank to
flow through the panels and reducing the chance
of the water freezing in the solar collectors.

Once the air temperature reaches 4ºC, the Frost
Protection Valve will close again and the water will
stop flowing.