Introduction: How to Convert a Grill From Propane to Natural Gas

I have had this grill for 3 years and have used it way more than I thought I would.  I am going through 3 tanks of propane per year, so it was time to make the switch to natural gas.  Please note:  I am a do-it-yourselfer, not a licensed gas plumber.  Do this project at your own risk.

Comments

author
bigkdawg made it! (author)2015-10-13

I just retrofitted my gas stove back to natural gaz (from propane). I wanted to maximize precision so I sent them a local machine shop where they are within +- 1/10000" ... (plus they charged me only $30 cnd)
I picked those guys b/c my other options were:
$500-600 cnd for original orifices with tubes from OEM
$1-4k cnd for another stove (used or new)

Luckily enough, my stove mfg (Frigidaire but most do) put a label in the drawer with the orifices sizes for both gases. (mm)
LP:
0.61
0.87
0.87
0.97
NG:
1.07
1.54
1.54
1.84

For the overly curious, this corresponds to the equation y = -0,2855x2 + 1,2984x - 0,4524. where y is propane and x is natural gaz. I wouldn't use that equation for other equipment without safely testing CO emissions.

P.S.: orifice size is 7mm for most stoves.

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author
HowToLou (author)bigkdawg2015-10-13

Thanks for the additional info. Nice conversion!