Out of stock
Next Shipment Due: 18/12/2021. Please phone to confirm availability.
Protects the boiler against frost damage. When the temperature falls below three degrees Celsius, the water automatically flows out of the boiler to the outside via a discharge nozzle.
- If there is a risk of frost or excess pressure, the drain valve opens automatically without electricity
- Valve can also be opened manually
- From seven degrees Celsius ambient temperature, the valve can be closed and the boiler filled again"