The Gas Flex Connector and Shut-Off Safety Valve are optional accessories that you may need when installing your IR Energy Gas Patio Heater.Use the gas flex connector to connect your patio heater to the gas line that is not more than 2 ft away. In case of a gas leak, the shut-off safety valve keeps you safe by cutting off the flow of gas. Turn off the Safety Valve by keeping it at a right angle from the pipe. We advise that a certified professional install these accessories for you.Buy these accessories to use and install your IR Energy Gas Patio Heater with ease.