As the gas passes through the tip of the pilot light it is ignited by the action.
How to light the pilot light on a wall heater.
Find the valve located in the heater and turn it to pilot.
Turn the control valve on the heater until the marker that says pilot is lined up with the marker on the outside casing.
Press inward on the valve.
Gas is funneled to the tip of a pilot light via a supply line that is connected to a natural gas or propane supply.
Here is how to light the pilot light on a gas heater.
Steps for safely lighting a gas wall heater have a match or long lighter available to light the pilot.
When the pilot lights remove the flame but keep pressing the button.