Capillary Fire Valve 1.5m 72 degree is designed and used to prevent fuel from flowing to an oil burning appliance such as a boiler or cooker in the event of a fire. The capillary sensors will detect the extra heat and will automatically cause the safety valve to close preventing the main oil tank from fuelling the fire. The valve body is installed outside of the main property with the sensor located in the appliance. Has a temperature limit of 72degC.