Powerful Function: The FD4 tilt switch can cut off the airflow to the main burner when the heater is tilted, preventing gas leakage and allowing you to use the heater safely. Easy installation: The thermocouple is connected to the valve, the probe is connected to the ignition device, and the other two ports are connected to the safety dump switch, which does not require any additional tools and is directly compatible with the original components. High Compatibility: FD4 tilt switch safety protection system kits is suitable for most patio heaters and thermoelectric gas heaters, indoor and outdoor heaters, round vertical propane heaters and pyramid patio heaters. Wide Application: For Outdoor propane heater, For Porch patio heater, For Pyramid heater, For Standing patio heater,For Thermoelectric gas heater, For Tower heater,For Hampton Bay heater,For Glass tube patio heater. You will get: 3-pack outdoor heater FD4 dump switch, if you have any questions, you can contact us in time, we will give you a satisfactory reply within 24 hours. For safety, if the heater tips or falls over, this device will automatically shut your heater off New manual style anti tilt switch pack of 2 15A switch weak Current Dump switch for Propane Gas Heaters Minivolt Current Model for Gas Only with 4.8mm terminals This model is suitable for room gas heater, outdoor patio heater and other Thermoelectric gas products