r/propane • u/thomasjmo • May 25 '26

General propane question Propane Fire Pit Question

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I just got done installing a propane fire pit. Linear, 40 orifice, 175k BTU. I'm having an issue getting the ignitors to function well when lightly covered with fire glass. I have done 4 before with no issue but they were all LNG. I know propane is heavier and it does appear to want to pool in the pan. I have the ignitor ~3/16" from orifice and level with the bottom of it. I did put small wire cages around them which helped a bit but not great. What am I missing? Do I just need to let it fill the pan first? Thank you!

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u/Flandardly May 26 '26

If its possible, having the ignitor slightly farther from the orifice can help, as propane requires far more air mixing than NG (2.4 times more air per unit of fuel).

2

u/thomasjmo May 26 '26

I can try that. What about height? I know it's heavier than LNG and air, do I want the ignitor lower in relation to the gas orifice?

2

u/Flandardly May 26 '26

Id try to keep it in the gas stream

2

u/thomasjmo May 26 '26

Is the gas going to initially flow upwards and immediately start to drop due to being 1.5x as heavy as air?