Hey guys, I have built a water feature on my patio. It is a cinder block pit 4X2 and 20" high. I have plumbed a gas line in it. My plan is to fill the pit with water and light the gas after it bubbles to the surface.. my gas line is about 5" under water (it has a 17" log igniter attached). I want to ignite the natural gas on the surface of the water: however, it will only stay lighted as long as I have a flame present. It goes out as soon as i remove the flame. any help would be appreciated.